5.3 A direct marketing company produces leaflets offering membership of a book club. These leaflets are then inserted into the magazine sections of two Sunday newspapers, the Citizen and the Despatch. 360 000 leaflets are put in copies of the Citizen and 2 130 000 are put in copies of the Despatch.

The company receives 19 447 completed leaflets from Citizen readers and 58 193 completed leaflets from Despatch readers. What is the probability that:

(a) A Citizen reader returns a leaflet?

(b) A Despatch reader returns a leaflet?