Probability Concepts Quiz

What is the key word that indicates you should multiply probabilities?

• and

• or

• if

• but

In a deck of 52 cards, what is the probability of drawing a jack?

• 1/4

• 4/52

• 1/52

• 1/13

What is the probability of a spinner landing on red if it has four equal sections?

• 1/4

• 1/2

• 1/5

• 1/3

What defines dependent events in probability?

• Events that are mutually exclusive

• Events where the occurrence of one affects the probability of the other

• Events that occur simultaneously

• Events that do not affect each other

How many total items are in the bag in the dependent events example?

• 15

• 18

• 12

• 10

What is the probability of the first student drawing sunglasses from the bag?

• 1/5

• 4/15

• 1/3

• 2/5

In the conditional probability example, how many red pencils are in the bag?

• 5

• 10

• 6

• 8

What is the probability of drawing a purple pencil second, given the first is red?

• 6/19

• 5/18

• 5/19

• 6/18

What is the total number of pencils in the bag initially?

• 17

• 21

• 15

• 19

What is the formula for conditional probability?

• P(A and B) / P(B)

• P(A) / P(B)

• P(A and B) / P(A)

• P(B) / P(A)