A box contains 4 red 5 blue and 6 green balls of identical size. two balls are drawn at random. the probability that one is blue and the other is green is?
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for blue= 5/15=1/3 and for for green= 6/15 and total is= 1/3+6/15=11/15
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Step-by-step explanation:
total 15 balls
two balls are drawn at random
15C2=15*14/2*1=105
one blue ball and other is green=6*5=30
therefore,
probability=30/105=6/21=2/7
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