If average of ages of Rakesh and Mohan is 15, average of ages of Mohan and Ramesh is 12 and average

English

Gujarati

Hindi

4.Average

medium

If the average of the ages of Rakesh and Mohan is $15,$ average of the ages of Mohan and Ramesh is $12$ and the average of the ages of Rakesh and Ramesh is $13,$ then the age of Mohan, is?

A

$16$

B

$13$

C

$14$

D

$12$

Solution

Total age of Rakesh and Mohan $=30$ years

Mohan + Ramesh $= \,24 \,years$

Rakesh $+$ Ramesh $=\, 26$ \,years

(Rakesh + Mohan + Ramesh) $=\frac{80}{2}=40$ years.

age of Mohan $=40-26=14$ years.

Standard 13

Quantitative Aptitude

Share

Similar Questions

The average temperature from Monday to Thursday is $48^{\circ} C$ and from Tuesday to Friday is $52^{\circ} C$. If the temperature on Monday is $42^{\circ} C$, what was it on Friday? (in $^{\circ} C$)

medium

There were $35$ students in a hostel. If the number of students increases by $7 ,$ the expenses of the mess increase by $Rs.\,42$ per $day$ while the average expenditure per head diminishes by $Rs.\,1$ Find the actual expenditure of the mess. (in $Rs.$)

hard

A club has $15$ men and $25$ women. The average age of men is $10\, years$ and the average age of women is $12 \,year.$ What is the average age of the whole club in $year$?

medium

Of the three numbers, second is twice the first and is also thrice the third. If the average of the three numbers is $44,$ the largest number is

medium

Of the three numbers, the average of the first and the second is greater than the average of the second and the third by $15 .$ What is the difference between the first and the third of the three numbers?

medium