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)=


ATQ ,


=


=


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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