Session 1

There are 5 blue marbles, 3 red marbles, 1 green marble, and 3 black marbles in a hat. Suppose you select one marble at random. Find P (neither red or green).

• 1/3

• 2/3

• 1/4

• 3/4

A card is chosen at random from a deck of 52 playing cards. What is the probability of drawing a 4 or a jack?

• 1/13

• 1/26

• 2/13

• 4/13

In a bag there are 8 green marbles, 5 pink marbles, and 2 mauve marbles. Once a marble is selected, it is not replaced. Find the probability of selecting a mauve marble and then a pink marble.

• 2/45

• 4/45

• 1/21

• 4/41

A box contains 3 postcards of Peoria and 9 postcards of Lake Station. If three postcards are selected at random without replacement, find the probability that all three are postcards from Lake Station.

• 7/192

• 2/3

• 3/4

• 63/165

A six-sided die is rolled twice. What is the probability of getting two odd numbers?

• 1/2

• 1/3

• 1/4

• 1/6

Which of the following events are dependent?

• Tossing a coin and picking a marble

• Tossing a coin then rolling a dice

• Eating a meal and getting full

• drawing a card from a deck, replacing, it and then drawing a second card

At the carnival the probability that Frankie rides the Wacky Walrus ride is .42, and the probability that Frankie rides the Hungry Hamster is .35. The probability that Frankie does both is .18. Find the probability that Frankie rides the Wacky Walrus or the Hungry Hamster.

• .59

• .77

• .79

• .62

A number is chosen at random from the set of two-digit numbers from 20 to 89 inclusive (including 20 and 89). What is the probability the number contains at least on digit 4?

• 1/10

• 1/7

• 17/70

• 8/35

There are 40 children in the class and they all have at least one ferret or weasel. 34 children have a ferret and 14 have a weasel. What is the probability that a child chosen at random from the class has both a ferret and a weasel?

• 7/20

• 1/5

• 17/20

• 3/20

In a group of 27 people, 13 like bow-tie pasta and 19 like rigatoni. They all like at least one of the two pastas. What is the probability that a person chosen at random from the group likes rigatoni but not bow-tie pasta?

• 14/27

• 13/27

• 19/27

• 5/27