Answer:
a) Red = 0.2 Blue= 0.4 and White =0.4
b) 90 counters in total
Explanation:
a)Firstly we know that the probability of mutually exclusive events is equal to 1 and the question states that the probability of blue and white counter is the same so we subtract 1-0.2 = 0.8 and we divide that by 2 as a result 0.4 .
b) P= Favourable outcomes / total number of outcomes
P(red) = 0.2
total number of red counters = 18
0.2 = 18/t cross multiplying have 0.2t= 18
Dividing throughout by 0.2 having 90