Probability Quizzes: Test Your Understanding of Chance and Likelihood

Question 1

A bag contains 5 red marbles, 3 blue marbles, and 2 green marbles. If you randomly pick a marble from the bag, what is the chance you will pick a blue marble?

Accepted Answer

3/10

Answer

1/2

Answer

1/5

Question 2

To determine the probability of a coin landing on heads, design an experiment that ensures fairness and provides reliable data.

Accepted Answer

Flip the coin 50 times, record the number of heads, and divide by the total number of flips.

Answer

Flip the coin 10 times and count the number of heads.

Answer

Flip the coin until you get 10 heads and then calculate the probability.

Answer

Flip the coin and only count the heads that land on a table.

Question 3

You are trying to decide whether or not to buy a lottery ticket. The probability of winning the lottery is 1 in 100,000,000. Should you buy a ticket?

Accepted Answer

No, because the probability of winning is very low.

Answer

Yes, because the probability of winning is very high.

Answer

Yes, because it is fun to dream about winning.

Question 4

You're considering buying a lottery ticket. The chance of winning the jackpot is 1 in 10 million. Each ticket costs $1. Should you buy a ticket?

Accepted Answer

No, because the chance of winning is too low.

Answer

Yes, because the chance of winning is high.

Answer

Yes, because the prize money is large.

Answer

No, because the prize money is too small.

Question 5

You flip a coin 10 times and get 6 heads. If you flip the same coin 100 times, how many heads would you expect to get?

Accepted Answer

60

Answer

15

Answer

100

Answer

I don't know

Question 6

A company claims their product reduces the risk of a certain disease by 50%. How would you design an experiment to test this claim?

Accepted Answer

Give the product to a group of people and track their health over time, comparing the results to a control group that doesn't get the product.

Answer

Survey people about their experiences with the product to determine its effectiveness.

Answer

Compare the sales figures of the product to similar products on the market.

Answer

Conduct a lab experiment on animals to test the product's effectiveness.

Question 7

A spinner has equal sections labeled A, B, C, and D. What is the probability of spinning section B?

Accepted Answer

1/4

Answer

1/2

Answer

1/8

Answer

1/16

Question 8

A box contains 3 black pens, 5 blue pens, and 2 red pens. You pick two pens at random, one after the other. What is the probability of picking two blue pens?

Accepted Answer

2/15

Answer

1/10

Answer

1/5

Answer

1/6

Question 9

A coin is flipped 5 times. What is the probability of getting exactly 3 heads?

Accepted Answer

0.26

Answer

0.5

Answer

0.76

Answer

1

Question 10

100 people were asked about their favorite fruit. 45 said apples. What's the probability that a random person likes apples?

Accepted Answer

45%

Answer

55%

Answer

90%

Answer

100%

Question 11

In probability, what is a sample space and why is it important?

Accepted Answer

A list of all possible outcomes of an experiment

Answer

The most likely outcome of an experiment

Answer

The probability of an event happening

Answer

Only used in complex probability calculations

Question 12

In a bag, there are 3 red balls, 2 blue balls, and 5 green balls. What is the probability of randomly choosing a blue ball?

Accepted Answer

1/5

Answer

1/2

Answer

2/5

Answer

1/10

Question 13

When two coins are tossed together, what is the probability of getting at least one tail?

Accepted Answer

3/4

Answer

1/2

Answer

1/4

Answer

1/8

Question 14

From a standard deck of 52 cards, a card is drawn randomly. What is the probability of drawing a face card (jack, queen, or king)?

Accepted Answer

3/13

Answer

1/13

Answer

1/4

Answer

3/52

Question 15

A bag contains 5 red balls and 7 blue balls. If three balls are drawn randomly without replacement, what is the probability that all three balls are blue?

Accepted Answer

1/21

Answer

1/35

Answer

1/49

Answer

1/63

Question 16

A bag contains 5 different colored marbles. What is the probability of drawing a specific marble from the bag?

Accepted Answer

1 in 5

Answer

1 in 4

Answer

1 in 10

Answer

1 in 20

Question 17

A spinner with 6 equal sections, each labeled with a different number from 1 to 6, is spun. What is the probability of spinning an even number?

Accepted Answer

1/2

Answer

1/3

Answer

1/4

Answer

1/6

Question 18

There are 10 balls in a bag: 5 red, 3 blue, and 2 green. What is the chance of randomly picking a red ball?

Accepted Answer

1 in 5

Answer

1 in 2

Answer

1 in 3

Answer

3 in 10

Question 19

A fair spinner has 6 sections, each with a different color. What is the probability of landing on red if you spin it once?

Accepted Answer

1 in 6

Answer

1 in 2

Answer

2 in 3

Answer

1 in 3

Question 20

Which of the following statements about probability is correct?

Accepted Answer

Probability ranges from 0 to 1.

Answer

Probability can be negative.

Answer

Probability is always greater than 1.

Answer

Probability is unpredictable.

Question 21

Which of these is an example of a compound event?

Accepted Answer

Rolling a six and then rolling an even number on two dice

Answer

Rolling a six on a die

Answer

Drawing a heart from a deck of cards

Answer

Flipping a coin and getting heads

Question 22

A bag has 10 blue counters and 5 red counters. If you pick a counter at random, what is the chance of picking a blue counter?

Accepted Answer

3 in 5

Answer

1 in 2

Answer

2 in 5

Answer

1 in 3

Question 23

What is the chance of rolling an even number on a standard six-sided dice?

Accepted Answer

1 in 2

Answer

1 in 3

Answer

1 in 4

Answer

1 in 6

Question 24

There are 5 red balls and 3 blue balls in a bag. What is the probability of randomly picking a blue ball?

Accepted Answer

1 in 3

Answer

1 in 2

Answer

1 in 4

Answer

1 in 8

Question 25

You flip a fair coin twice. What is the chance of getting heads both times?

Accepted Answer

1 in 4

Answer

1 in 2

Answer

3 in 4

Answer

1 out of 1

Question 26

A survey of 100 students showed that 60 preferred football and 40 preferred cricket. What is the chance that a randomly chosen student prefers football?

Accepted Answer

0.6

Answer

0.4

Answer

0.5

Answer

0.8

Question 27

A bag contains 4 red balls, 3 blue balls, and 2 green balls. What is the probability of randomly drawing a red ball or a green ball?

Accepted Answer

5 in 9

Answer

1 in 2

Answer

2 in 3

Answer

1 in 3

Question 28

What is the probability of getting at least one heads when you flip two coins?

Accepted Answer

3 in 4

Answer

1 in 2

Answer

1 in 4

Answer

1 out of 1

Question 29

A bag contains **5 red balls** and **3 blue balls**. What is the probability of drawing a red ball from the bag?

Accepted Answer

1/2

Answer

1/8

Answer

1/3

Answer

3/8

Question 30

A fair dice is rolled. What is the probability of rolling a number **greater than 4**?

Accepted Answer

1/2

Answer

1/3

Answer

1/4

Answer

1/6

Question 31

A survey of **100** people found that **60%** of them prefer tea over coffee. What is the probability that a randomly chosen person from the survey prefers tea?

Accepted Answer

0.6

Answer

0.3

Answer

0.4

Answer

0.7

Question 32

What is the chance of rolling a 6 on a standard six-sided dice?

Accepted Answer

1 in 6

Answer

1 in 2

Answer

1 in 3

Answer

1 in 4

Question 33

Which of these is NOT a factor that affects probability?

Accepted Answer

Past events

Answer

Number of possible outcomes

Answer

Favourable outcomes

Answer

Size of the sample space

Question 34

A spinner has 4 equal sections. What is the probability of the spinner landing on the section marked 'A'?

Accepted Answer

1 in 4

Answer

1 in 2

Answer

1 in 3

Answer

1 in 5

Question 35

A survey of 100 students found that 60 like football and 30 like basketball. What is the likelihood that a student picked at random likes football?

Accepted Answer

0.6

Answer

0.3

Answer

0.4

Answer

0.8

Question 36

True or False: The probability of an event can be more than 1.

Accepted Answer

False

Answer

True

Question 37

What is the opposite of the event 'Rolling an even number on a dice'?

Accepted Answer

Rolling an odd number on a dice

Answer

Rolling a 6 on a dice

Answer

Rolling a number greater than 3 on a dice

Answer

Rolling a number less than 5 on a dice

Question 38

A bag contains 5 red balls, 3 blue balls, and 2 green balls. What is the probability of selecting a red ball from the bag?

Accepted Answer

0.4

Answer

0.2

Answer

0.3

Answer

0.5

Question 39

A fair coin is flipped twice. What is the probability of getting heads both times?

Accepted Answer

0.25

Answer

0.5

Answer

0.75

Answer

1.0

Question 40

A bag contains 4 red marbles and 6 blue marbles. If a marble is picked at random, what is the probability that it is not red?

Accepted Answer

0.6

Answer

0.2

Answer

0.4

Answer

0.8

Question 41

Which of the following is NOT a factor to consider when calculating probability?

Accepted Answer

Previous outcomes

Answer

Sample space

Answer

Number of favourable outcomes

Answer

Type of event

Question 42

A bag contains 4 red marbles, 3 blue marbles, and 2 green marbles. What is the probability of drawing a marble that is not green?

Accepted Answer

¾

Answer

½

Answer

⅔

Answer

1

Question 43

In a box with 3 red balls and 5 blue balls, what is the probability of drawing two blue balls in a row without putting the first ball back?

Accepted Answer

1/20

Answer

1/4

Answer

1/10

Answer

1/40

Question 44

A spinner has 6 equal sections, numbered from 1 to 6. When you spin it once, what is the likelihood of landing on an even number?

Accepted Answer

1 in 2

Answer

1 in 3

Answer

1 in 4

Answer

1 in 6

Question 45

In a bag, you have 3 red marbles, 2 blue marbles, and 5 green marbles. What is the probability of choosing a green marble?

Accepted Answer

2/5

Answer

1/2

Answer

1/3

Answer

1/5

Question 46

A survey of 100 students found that 60 enjoy reading. What is the probability of randomly picking a student who enjoys reading?

Accepted Answer

0.6

Answer

0.4

Answer

0.3

Answer

0.2

Question 47

Which of the following is NOT a factor that affects probability?

Accepted Answer

Past events

Answer

Number of possible outcomes

Answer

Favourable outcomes

Answer

Randomness

Question 48

A spinner has 6 equal sections, numbered 1 to 6. If you spin the spinner, what is the probability of getting an even number?

Accepted Answer

1/2

Answer

1/3

Answer

1/4

Answer

1/6

Question 49

Which of these values represents a probability?

Accepted Answer

0.25

Answer

-0.5

Answer

0

Answer

1.5

Question 50

A bag contains 5 red marbles, 3 blue marbles, and 2 green marbles. What is the probability of drawing a blue marble?

Accepted Answer

3/10

Answer

1/5

Answer

2/5

Answer

1/3

Question 51

A spinner has 6 equal sections, numbered 1 to 6. What is the probability of spinning a number divisible by 2?

Accepted Answer

1/2

Answer

1/6

Answer

2/3

Answer

1/3

Question 52

A box contains 3 red pencils, 2 blue pencils, and 5 yellow pencils. If a pencil is picked at random, what is the probability that it is not blue?

Accepted Answer

8/10

Answer

3/10

Answer

5/10

Answer

2/10

Question 53

A teacher asks each student in her class to choose a number between 1 and 10. What is the probability that a student will choose the number 7?

Accepted Answer

1/10

Answer

7/10

Answer

1/7

Answer

1/5

Question 54

A bag has 5 red balls and 3 blue balls. If you pick one ball at random, what is the chance of getting a red ball?

Accepted Answer

5/8

Answer

5/3

Answer

1/2

Answer

3/8

Question 55

You flip a fair coin once. What is the probability of getting tails?

Accepted Answer

1/2

Answer

0

Answer

1/4

Answer

1

Question 56

Imagine 10 cards numbered from 1 to 10. If you pick one card randomly, what's the chance it will have an even number?

Accepted Answer

1/2

Answer

1/10

Answer

1/5

Answer

5/10

Question 57

A spinner has 6 equal sections, each a different color. What's the chance the spinner will land on blue?

Accepted Answer

1/6

Answer

1

Answer

1/3

Answer

1/2

Question 58

If you roll a regular six-sided die, what's the probability of getting a number less than 3?

Accepted Answer

1/3

Answer

2/3

Answer

1/2

Answer

1/6

Question 59

The chance of something happening is 0.7. What's the chance of it NOT happening?

Accepted Answer

0.3

Answer

0.7

Answer

1

Answer

0

Question 60

A bag has only green and purple marbles. The chance of picking a green marble is 2/5. What's the chance of picking a purple marble?

Accepted Answer

3/5

Answer

4/5

Answer

2/5

Answer

1/5

Question 61

Which of these numbers shows the highest probability?

Accepted Answer

0.8

Answer

0.5

Answer

0.1

Answer

0.2

Question 62

A box has 4 blue pencils, 3 red pencils, and 2 green pencils. Sarah picks one pencil randomly. What's the chance she picks a pencil that's NOT blue?

Accepted Answer

5/9

Answer

4/9

Answer

7/9

Answer

2/9

Question 63

Which of these is TRUE about probability?

Accepted Answer

Probability is always a number between 0 and 1.

Answer

Probability can be greater than 1.

Answer

Probability cannot be 0.

Answer

Probability is always a whole number.

Question 64

A bag contains 5 red marbles, 3 blue marbles, and 2 green marbles. What is the probability of **randomly** selecting a green marble?

Accepted Answer

2/10

Answer

5/10

Answer

3/10

Answer

1/10