Q. 515.0( 4 Votes )

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 in the bag.

Answer :

Given: number of red balls = 6

Let number of blue balls be x


Total number of possible outcomes, n(S) = 6 + x


Number of favorable outcomes = n(E)



P(blue ball) = 2P(red ball)



x = 12


number of blue balls = 12


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