Question

A bag contains a mixture of identical coloured balls.

The probability of selecting a blue ball from the bag is 0.4
(a) Calculate the probability of not selecting a blue ball
(b) If there are 80 balls in the bag, calculate how many are not blue

Answer 1

a) 0.6

b) 48

Explanation:

a) 0.4 = 40%.

100% - 40% = 60% = 0.6

b) 0.6 (60%) are not blue.

0.6 x 80 = 48.