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CBSE Class 10 Answered

A bag contains 5 red balls and some blue balls. If the probability of drawing a blue ball from the bag is thrice that of a red ball, find the number of blue balls in the bag.
Asked by Topperlearning User | 09 Nov, 2017, 01:50: PM
answered-by-expert Expert Answer

begin mathsize 12px style Let space the space number space of space blue space balls space be space straight y. Total space number space of space balls space equals space 5 thin space plus space straight y Probability space of space blue space ball space equals space 3 cross times probability space of space red space ball fraction numerator straight y over denominator 5 space plus space straight y end fraction space equals space fraction numerator 3 cross times 5 over denominator 5 space plus space straight y end fraction straight y space equals space 15 The space number space of space blue space balls space are space 15. end style

Answered by | 09 Nov, 2017, 03:50: PM

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