Probability Practice Worksheets

**Page 1**

1.

Express verbally the probability of selecting a nickel from a box which contains quarters, nickels, dimes and pennies.

a. | 4 out of 10 | ||

b. | 1 out of 10 | ||

c. | 5 out of 10 | ||

d. | 3 out of 10 |

There are 3 nickels.

So, the probability of selecting a nickel is 3 out of 10.

Correct answer : (4)

2.

What is the probability of getting a sum of 10 when two dice are rolled?

a. | $\frac{1}{18}$ | ||

b. | $\frac{1}{12}$ | ||

c. | $\frac{1}{36}$ | ||

d. | $\frac{1}{9}$ |

[Each dice has 6 faces.]

Total number of favorable outcomes to get a sum of 10 is 3.

[The favorable outcomes are (6, 4), (5, 5), (4, 6).]

Probability(event) =

[Formula.]

P(sum of 10) =

[Substitute the values.]

=

[Simplify.]

The probability of getting a sum of 10 when two dice are rolled is

Correct answer : (2)

3.

Express the probability of picking a yellow colored shape by using a fraction.

a. | $\frac{3}{31}$ | ||

b. | $\frac{4}{31}$ | ||

c. | $\frac{28}{31}$ | ||

d. | $\frac{1}{31}$ |

There are 4 yellow colored shapes.

So, the probability of picking a triangle is

Correct answer : (2)

4.

A basket contains different fruits as shown. Verbally express the probability of picking a strawberry.

a. | 1 out of 16 | ||

b. | 15 out of 16 | ||

c. | 7 out of 16 | ||

d. | 3 out of 16 |

[Basket contains 16 fruits.]

There are 3 strawberries in the basket.

So, the probability of picking a strawberry is 3 out of 16.

Correct answer : (4)

5.

A single card is chosen at random from a standard deck of 52 cards. What is the probability that the card chosen is a Jack?

a. | $\frac{1}{3}$ | ||

b. | $\frac{3}{52}$ | ||

c. | $\frac{1}{13}$ | ||

d. | $\frac{1}{8}$ |

Number of favorable outcomes is 4.

Probability(event) =

[Formula.]

P(a Jack) =

[Substitute the values and simplify.]

The probability that the card chosen is a Jack is

Correct answer : (3)

6.

A cube is chosen at random from 11 blue cubes in a bag. What is the probability of getting a blue cube?

a. | $\frac{1}{11}$ | ||

b. | $\frac{1}{2}$ | ||

c. | 1 |

Since all the cubes in the bag are blue, the number of favorable outcomes is 11.

Probability of an event =

[Formula.]

P(blue cube) =

[Substitute the values.]

= 1

[Divide.]

The probability of getting a blue cube is 1.

Correct answer : (3)

7.

There are 14 coins in Henry's pocket. What is the probability of Henry choosing one out of them?

a. | 14 | ||

b. | $\frac{1}{14}$ | ||

c. | $\frac{1}{2}$ | ||

d. | 1 |

Number of favorable outcomes = 1

P (coin) =

=

[Substitute the values.]

So, the probability of Henry choosing a coin from his pocket is

Correct answer : (2)

8.

a. | $\frac{8}{19}$ | ||

b. | $\frac{1}{19}$ | ||

c. | $\frac{5}{19}$ | ||

d. | $\frac{6}{19}$ |

[Add the number of white, red and yellow flowers in the vase.]

Number of favorable outcomes = 5

[There are 5 red roses in the vase.]

So, the probability of picking a red rose is

Correct answer : (3)

9.

What is the probability of choosing a green marble from a bag containing 16 red marbles and 16 green marbles?

a. | $\frac{1}{3}$ | ||

b. | $\frac{1}{4}$ | ||

c. | $\frac{1}{2}$ | ||

d. | $\frac{1}{5}$ |

Number of favorable outcomes = 16

Probability (green marble) =

=

[Divide.]

So, the probability of choosing a green marble from the bag is

Correct answer : (3)

10.

A teacher chooses a student at random from a class of 58 girls. What is the probability that the student chosen is a girl?

a. | 1 | ||

b. | $\frac{1}{2}$ | ||

c. | $\frac{1}{30}$ |

Since all the students in the class are girls, number of favorable outcomes is 58.

Probability of an event =

[Formula.]

P (girl) =

[Substitute the values.]

The probability that the student chosen is a girl is 1.

Correct answer : (1)

More Probability Practice Worksheets | |

Probability Word Problems | |