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The Cost of 12 books is Rs 450. find the Cost of 7 books.

Class: 9

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Rs 262

Rs 260

Rs 261.5

Rs 262.5

answer is D.

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Detailed Solution

∵ The cost of 12 books = Rs 450
∴ The cost of 1 book is =

\frac{450}{12}

\frac{75}{2}

= 37.5
∴ The cost of 7 book= 7x 37.5=262.5
= Rs 262.5

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