a bag contains 6 red balls and some blue balls. if the probability of drawing a blue ball from the bag is twice that of a red ball , find the number of blue balls
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6 red balls
x blue balls
{x/x+6}={6/x+6}2
x=6*2
x=12
6 red balls
x blue balls
{x/x+6}={6/x+6}2
x=6*2
x=12
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