Question
A school bought 45 benches and 55 desks. Average cost of
a bench is Rs. 1,800 and that of a desk is Rs. 2,700. Find the average cost (in Rs.) of all the benches and desks.Solution
ATQ,
Required average = (45 × 1800 + 55 × 2700) ÷ (45 + 55)
= (81000 + 148500) ÷ 100
= (229500 ÷ 100) = Rs. 2,295
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