Question

(a) Complete the table.

There are 18 red counters in the bag.
(b) Work out the total number of counters in the bag.

Answer 1

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