Question

A bag contains 3 green 4 yellow and 5 white balls. 3 balls are drawn at random. What is the probability that all the three balls are not of same colour

Answer 1

favorable outcomes of green ball = 3

total possible outcomes = 12

p (event) = 3/12 = 1/4

favorable outcomes of yellow ball = 4

total possible outcomes = 12

p (event) = 4/12 = 1/3

favourable outcomes of white ball = 5

total possible outcomes = 12

p (event) = 5/12......