Probability mini quiz

A student conducts an experiment in which se rolls an 8-sided number cube and spins a 4-colored spinner. How many events (outcomes) are in the sample space?

• 32

• 12

• 64

• 12

On the chess team, there are 5 seniors, 5 juniors, and 4 sophomores. Of these students 3 seniors, 2 juniors, and 3 sophomores are female. One student is picked at random to represent the school in a state competition.

What is the probability that the student is a senior or a girl?

• 2/7

• 1/2

• 4/7

• 5/7

A pair of dice are rolled, what is the probability that you roll a sum of 5?

• 5/36

• 1/9

• 1/18

• 1/36

The following dot plot is the number of hours Sam studies for her biology test each week. What is the probability she will study 4 hours this week.

• 1/2

• 2/11

• 4/11

• 5/11

The Venn Diagram shows the number of juniors on a varsity sports team. Some athletes are on varsity teams for one season only, some for two seasons, and some for all three seasons. What is the probability that an athlete chosen at random plays a fall or winter sport?

• 13/19

• 13/32

• 1/2

• 13/16

A die is rolled. What is the probability that it is odd or a multiple of 3?

• 1/6

• 2/3

• 1/3

• 5/6

A school survey found that 9 out of 10 students like pizza. If 3 students are chosen at random, what is the probability that all three students like pizza?

• .9

• .729

• .7

• .3

Four cards are chosen from a standard deck of 52 playing cards . What is the probability of choosing 4 hearts in a row, without replacement? (13 hearts in a deck)

• 1/4

• 11/4165

• 1/256

• 1/13

Two cards are chosen at random, with replacement, from a deck of 52 cards. What is the probability of getting a 7 and a 8?

• 1/26

• 4/663

• 1/169

• 1/52

A school survey found that 7 out of 30 students walk to school. If four students are selected at random without replacement, what is the probability that all four walk to school?

• 7/30

• 2/15

• 14/15

• 1/783