A student bought 4 books for Rs. ,120 from one book shop and 6 books for Rs., 150 from another. aver

English

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

Share

Similar Questions

The average weight of $A , B$ and $C$ is $45\, kg$. If the average weight of $A$ and $B$ is $40 \,kg$ and that of $B$ and $C$ is $43\, kg$, then the weight of $B$ is

hard

The average of first $46$ natural number is

easy

The average weight of three boys $A, B$ and $C$ is $54 \frac{1}{3} \,kg,$ while the average weight of three boys $B , D$ and $E$ is $53 \,kg .$ What is the average weight of $A , B , C , D$ and $E$ ?(in $kg$)

medium

The average marks obtained by $40$ students of a class is $86 .$ If the $5$ highest marks are removed, the average reduces by one mark. The average marks of the top $5$ students is

hard

The average age of a committee of $8$ members is $40 \,years.$ A member, aged $55\, years,$ retired and he was replaced by a member aged $39\, years.$ The average age of the present committee is (in $years$)

easy