SOLUTION: A box contains 3 red balls and 4 green balls. If two balls are randomly selected in sequence, what is the possibility that a red ball and a green ball are picked out of the box.

Question 565378: A box contains 3 red balls and 4 green balls. If two balls are randomly selected in sequence, what is the possibility that a red ball and a green ball are picked out of the box. State the rule for P(A&B) and then substitute the values and compute the answer.

Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
A box contains 3 red balls and 4 green balls. If two balls are randomly selected in sequence, what is the possibility that a red ball and a green ball are picked out of the box.
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# of red/green pairs: 3*4 = 12
# of random pairs: 7C2 = (7*6)/(1*2) = 21
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P(red/greed pair) = 12/21 = 4/7
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Cheers,
Stan H.
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