Probability Worksheets

**Page 21**

201.

A die is rolled. Find the probability of rolling a 2 or 4.

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

b. | $\frac{1}{6}$ | ||

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

d. | $\frac{2}{3}$ |

Correct answer : (3)

202.

What is the probability of selecting a head when a coin is tossed, if the probability of selecting a tail is $\frac{1}{2}$?

a. | 1 | ||

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

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

d. | $\frac{2}{6}$ |

Correct answer : (2)

203.

What is the probability of not selecting a number 4 when a number cube is rolled, if the probability of selecting a number 4 is $\frac{1}{6}$?

a. | 1 | ||

b. | $\frac{5}{6}$ | ||

c. | $\frac{2}{6}$ | ||

d. | $\frac{1}{6}$ |

Correct answer : (2)

204.

Which of the following are complementary events?

a. | getting a number that is a multiple of 2, or a number that is a multiple of 3, when a number cube is rolled | ||

b. | getting a number greater than 2 or a number greater than 3, when a number cube is rolled | ||

c. | picking a marble from a bag containing only red and yellow marbles | ||

d. | picking a Jack or a Spade from a pack of playing cards |

Correct answer : (3)

205.

Terry is choosing a marble from a bag containing 1 black marble, 1 brown marble, and 1 white marble. What is the probability that he will not choose a brown marble?

a. | $\frac{2}{3}$ | ||

b. | $\frac{3}{2}$ | ||

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

d. | 1 |

Correct answer : (1)

206.

Johnny rolled a number cube. What is the probability of NOT getting a 4?

a. | $\frac{1}{6}$ | ||

b. | 1 | ||

c. | $\frac{5}{6}$ | ||

d. | $\frac{2}{6}$ |

Correct answer : (3)

207.

In a piggy bank, 12 out of 20 coins are nickels. A coin is drawn from the piggy bank and is not replaced. A second coin is then drawn. Which expression helps you to find the probability that both the coins are nickels?

a. | $\frac{12}{20}$ + $\frac{8}{12}$ | ||

b. | $\frac{12}{20}$ × $\frac{11}{19}$ | ||

c. | $\frac{12}{20}$ × $\frac{11}{12}$ | ||

d. | $\frac{12}{20}$ × $\frac{12}{19}$ |

Correct answer : (2)

208.

Three coins are tossed. Find P(H, H, H).

a. | $\frac{1}{6}$ | ||

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

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

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

Correct answer : (4)

209.

Henry draws a card from a pack of cards and also throws a die. What is the probability of Henry drawing a king and getting a number less than 4?

a. | $\frac{25}{26}$ | ||

b. | $\frac{5}{26}$ | ||

c. | $\frac{1}{26}$ | ||

d. | $\frac{3}{26}$ |

Correct answer : (3)

210.

The probability that a red card is picked from a standard deck of 52 cards is 0.5. The probability of picking a red card with an ace is 0.04. What is the probability that a card picked from the deck turns out to be an ace given that the card is red?

a. | 0.04 | ||

b. | 0.50 | ||

c. | 0.27 | ||

d. | 1 |

Correct answer : (1)