Henrico Math 8 Probability

What is the probability of randomly selecting an odd number from the numbers 1 -15?

• 8/15

• 1/2

• 7/15

• 1/8

Twelve students have an equally likely chance of being selected in a drawing at school. Eight are girls and four are boys. What is the probability that a boy will be selected?

• 1/4

• 1/3

• 1/8

• 3/4

A number cube is rolled. What is the likelihood that a number less than or equal to three is rolled?

• unlikely

• equally likely

• likely

• certain

At a school assembly 3 out of the first 10 students were wearing spirit wear. Based on this information, if 400 students were at the assembly, then how many students could be expected to be wearing spirit wear?

• 120

• 40

• 30

• 280

Tags

CCSS.7.RP.A.3

Two number cubes are rolled sequentially. What is the probability that the first number cube shows a five and the other number cube shows an even number?

• 1/12

• 1/6

• 1/2

• 11/12

There are five marbles in a bag. Three are green, and two are yellow. You draw a marble, do not replace it, and then draw another. What is the probability of choosing two yellow marbles?

• 1/10

• 2/5

• 3/5

• 4/25

The letters in the word AUGUST are placed into a bag. What is the probability of selecting a U?

• 2/5

• 1/3

• 3/5

• 3/6

The spinner below is spun twice. What is the probability of the arrow landing on a 3 and then on an odd number?

• 1/3

• 1/9

• 2/9

• 2/6

The list below shows the different choices of pizza at the local pizza shop:

•pepperoni: 11

•supreme: 7

•cheese: 6

•Hawaiian: 3

Based on these results, if 189 pizzas were sold, then how many could be expected to be cheese?

• 42

• 7

• 77

• 182

Michael has a set of five cards shown below. Michael will randomly select a card, not replace it, and then select another card. What is the probability that he selects a prime number and then a 1?

• 3/20

• 1/5

• 4/5

• 3/25