# Math

You draw a marble from a jar containing 5 red marbles, 5 green marbles, and 6 blue marbles. Find the probability of drawing a green given that you did not draw a red.
P(green | not red)

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1. The formula for conditional prob is
Prob( A | B) = P(A and B)/P(B)

but you said you were drawing "a marble" suggesting only one is drawn.

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posted by Reiny

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