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Q1. (a) A supplier buys 80 items, all at the same price. He sells 50 of them at a profit of 30% on each. He sells the remainder at a profit of 15 % on each.

Calculate the overall profit he made on the sale of the 80 items. (8)

(b) A car is driven for 5 hours without stopping from town A to town B. The return journey on the same route took only three hours. The return average speed was 26 mph faster than the first journey.

Determine the average speed of the journeys in each direction. (8)