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Question
A bag contains 5 red balls and some blue balls. If the probability of drawing a blue ball is double that a red ball, find the number of blue balls in the bag.
A bag contains 5 red balls and some blue balls. If the probability of drawing a blue ball is double that a red ball, find the number of blue balls in the bag.
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Solution
The correct option is C 10
no of Red balls=5
let number of Blue balls=x
p(red)=5(5+x)
therefore p(blue)=10(5+x)
no of blue balls=10
10
no of Red balls=5
let number of Blue balls=x
p(red)=5(5+x)
therefore p(blue)=10(5+x)
no of blue balls=10
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