Question

A bag contains 27 balls of which some are white and others are red . A ball is chosed at randam . The probability of getting a red ball is 2/3 . Find the number white balls ?

Answer 1

Let number of red balls be x
P(red ball)=2/3
2/3= x/27
x= 2/3*27
=18
No of white balls = 27-18=9

Answer 2

27*2/3=18balls are red.
27*1/3=9 balls are white.
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