Probability and Replacement

An urn contains 4 red marbles and 7 blue marbles. Two marbles are drawn at random. What is the probability that the first is red and the second is blue if the marbles are drawn with replacement?

An urn contains 4 red marbles and 7 blue marbles. Two marbles are drawn at random. What is the probability that the first is red and the second is blue if the marbles are drawn without replacement?

John has a mug that contains seven Greek coins and 5 roman coins. A coin is drawn at random and not replaced. Then another coin is randomly drawn. What is the probability that the first coin was Greek and second coin was Roman?

Bingo has and urn with 5 purple marbles, 6 red marbles and 4 green marbles. She randomly draws one marble. What is the probability that the marble is purple?

Bingo has and urn with 5 purple marbles, 6 red marbles and 4 green marbles. She randomly draws one marble. What is the probability that the marble is red?

Oscar has a bag of game pieces - what is the probability that he will choose a blue piece, replace it, then choose a yellow piece?

You draw a marble from a bag that has 4 red, 2 blue, and 3 green, you also flip a fair coin. What is the probability you will draw a blue marble and flip a heads?

• 1/9

• 3/9

• 3/6

• 5/6

P(1 and A)

• 1/16

• 1/10

• 4/16

• 1/4

The following M & M colors are in the bowl:
4 yellow, 6 orange, 3 green, 5 blue, 2 brown
What is the probability of selecting a blue, eating it then selecting yellow?

• 2/18

• 1/9

• 2/20

• 1/19

A coin and a number cube with the numbers 1 through 6 are tossed. What is the probability of the coin showing tails and the number cube showing the number 3? 

• 1/12

• 1/4

• 1/8

• 1/2