a bag contains 12 blue balls and x red balls.if one ball is drawn at random .1)what is the probability that it is a red ball.2) if 8 more red balls are put in bag and if the probability of drawing a red ball will ne twice that of probability of black ball then find x.
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Probability of getting blue ball=x/20
balls in bag=x+10
(x+10)/20=x/10
20x=10x+100
x=10
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