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WAEC Mathematics 2015 Paper

Question : 37

Total: 45

Solution:

Concept:

Profit or loss percent is always calculated on the cost price.

Explanation:

Cost price: 5 oranges cost

\mathrm{N}40.00

So, cost price of 100 oranges =

\frac{100}{5} \times \mathrm{N}40.00 = \mathrm{N}800.00

Selling price: 20 oranges sell for

\mathrm{N}120.00

So, selling price of 100 oranges =

\frac{100}{20} \times \mathrm{N}120.00 = \mathrm{N}600.00

Since selling price is less than cost price, there is a loss.

Loss = Cost price

-

Selling price =

\mathrm{N}800.00 - \mathrm{N}600.00 = \mathrm{N}200.00

Loss percent =

\frac{\text{Loss}}{\text{Cost price}} \times 100\%

\frac{200}{800} \times 100\% = 25\%

Answer:

25% loss (Option D).

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