A call centre aims to deal with calls in less than 5 minutes. Calls come in randomly.
The table shows data for the calls made to the centre.
Completed in less than 5 minutes
Type of call
Customer complaints
New business
Proportion of all calls
1/4
3/4
1/2
1/8
Work out the probability that the next call will be a customer complaint completed within under 5
minutes
Give your answer as a fraction in its simplest form.