A man purchases milk for three consecutive years. In the

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A man purchases milk for three consecutive years. In the first year, he purchases milk at the rate of ₹7.50 per litre, in the second year, at the rate of ₹8.00 per litre and in the third year, at ₹8.50 per litre. If he purchases milk worth ₹4,080 each year, the aver-age price of milk per litre for the three years is

Quantity of milk :-
First year ⇒ 4080 ÷ 7.5 = 544 litres
Second year ⇒ 4080 ÷ 8 = 510 litres
Third year ⇒ 4080 ÷ 8.5 = 480 litres

∴ Required average =	3 × 4080
	544 + 510 + 480

Required average =	12240
	1534

Required average = ₹ 7.98 per litre