Gujarati
Hindi
4.Average
medium

A student bought $4$ books for $Rs. \,120$ from one book shop and $6$ books for $Rs.\, 150$ from another. The average price (in rupees), he paid per book was 

A

$27$

B

$27.50$

C

$135$

D

$138$

Solution

cost of $10$ books $= Rs\, (120+150)\,= Rs. \,270$

Average cost $= Rs \, cdot\left(\frac{270}{10}\right)= Rs .27$

Standard 13
Quantitative Aptitude

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