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

A cyclist goes from a place to another and returns by the same route. He pedals his way uniformly with speed $u$ while going and with speed $v$ while returning. The average speed of his journey is

medium

Of the three numbers whose average is $60,$ the first is one-fourth of the sum of the others. The first number is

medium

The average of runs of a cricket player of $10$ innings was $32 .$ How many runs must he make in his next innings so as to increase his average of runs by $4 \,?$

medium

The average of $25$ results is $20 .$ the average of first $12$ results is $15$ and that of the last $12$ results is $18 .$ Then, the $13^{ th}$ results is

medium

The average of the first $7$ integers in series of $13$ consecutive odd integers is $37 .$ What is the average of the entire series ?

easy