Asked by PT
Jar A has 2 red marbles, 4 green marbles, and 3 blue marbles. Jar B has 4 pink marbles, 6 purple marbles, and 2 white marbles. Marcy randomly choo
ses 2 marbles from Jar A, then 2 marbles from Jar B, without replacement in each case. What is the probability that she gets 1 purple marble, 1 pink marble, and 2 green marbles?
ses 2 marbles from Jar A, then 2 marbles from Jar B, without replacement in each case. What is the probability that she gets 1 purple marble, 1 pink marble, and 2 green marbles?
Answers
Answered by
oobleck
A has 9 marbles to start, and B has 12.
P(A=green,green) = 4/9 * 3/8
P(B=purple,pink) = 6/12 * 4/11
P(B=pink,purple) = 4/12 * 6/11
so, add 'em up, since they are independent events
P(A=green,green) = 4/9 * 3/8
P(B=purple,pink) = 6/12 * 4/11
P(B=pink,purple) = 4/12 * 6/11
so, add 'em up, since they are independent events
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