Q. 344.8( 4 Votes )

A bag contains 5

Answer :

Let the number of blue balls be X

So total number of balls = 5+X

P(probability of drawing a red ball from the bag) =

P(probability of drawing a blue ball from the bag)=




5X +X2 = 75+15X

X2 - 10X+ -75 = 0

(x-15)(x+5) =0

So X -5

Therefore No. Of blue balls = 15

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