Test Index

JAMB Mathematics 2015 Paper

Question : 28

Total: 61

Solution:

Concept:

Selling price is the cost price plus the profit of 15%.

Explanation:

Let the cost price be

C

A gain of 15% means the selling price is

115\%

of the cost price.

So,

1.15C = N420{,}000

Therefore,

C = \frac{N420{,}000}{1.15}

Calculating:

C = N365{,}217.39

Rounded to the nearest naira, the cost price is

N365{,}217

Answer:

The car cost him N365,217.

Correct option: B.

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