Question

a bag contain 15 balls out of which some are white and others are black.if the probabiltyof srawing a black ball at random from abag is2/3 then find how many white balls are there in bag​

Answer 1

The probability of getting black ball is 2/3

Total no. Of balls is 15

So we can get black balls as 10 because

P(E) = n(E) /n(s)

So if we give n(E) =10

Then p(E) =10/15
=2/3


So black balls is 10
White balls is,, 15-10=5