Probability Review

The letters of the word Q U I Z Z I Z are written on index cards. What is the probability that you select two Z's in a row? After you select the first card you put it back (replace it) before the selecting the 2nd card.

• 9/49

• 3/49
• 3/7

• 3/14

The letters of the word Q U I Z Z I Z are written on index cards. What is the probability that you select two Z's in a row? After you select the first card you do NOT put it back before the selecting the 2nd card.

• 1/42

• 5/13

• 3/7

• 1/7

How many ways can you select a group of 4 books from the 9 books on your shelf?

• 72
• 3024

• 24

• 126

Suppose you want to arrange your favorite four books from a group of 9. How many different possible arrangements can you make?

• 3024
• 5040
• 720
• 24

You would like to find out what type of food kids between the ages of 12 and 14 like the best. You interview 300 people at the mall. Is this a good survey? Explain why or why not.

Tags

CCSS.7.SP.A.1

CCSS.HSS.IC.A.1

In a box of 50 markers 2 are defective. Based on the sample, estimate the number of defective markers in a box of 600.

• 50
• 600
• 24
• 10

Tags

CCSS.7.SP.A.2

A menu consists of 3 appetizers, 5 main courses, and 4 desserts. How many choices are there for ordering an appetizer, main course and dessert?

• 12
• 20
• 30
• 60

If you were to toss 2 coins at the same time. What is the probability that you would get exactly 1 tail? [P(exactly 1 tail)].

• 1/4

• 1/2

• 3/4

• 1

Find the probability of rolling a 3 on three number cubes.

• 1/216
• 1/3
• 1/36
• 1/6

Suppose you roll 2 numbers cubes and pick a letter from the alphabet. Find the probability of rolling 2 even numbers and selecting one of the following letters: M, A, T, H.

• 3/19

• 1/39

• 1/26

• 1/144