The average age of the boys in a class is $16$ years and that of the girls is $15$ years. The average age for the whole class when there are equal number of girls and boys is:

15

years

No worries! We‘ve got your back. Try BYJU‘S free classes today!

15.5

years

Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses

16

years

No worries! We‘ve got your back. Try BYJU‘S free classes today!

Cannot be computed with the given information

No worries! We‘ve got your back. Try BYJU‘S free classes today!

Open in App

Solution

The correct option is B $15.5$ years
Let No of boys = No of girls = x
Avg age of whole class = $\frac{16 \times x + 15 \times x}{x + x}$
$= \frac{16 + 15}{2}$
$= 15.5$ years

Suggest Corrections

Similar questions

Q. In a class, the average age of

20

boys is

16

years and the average age of

18

girls is

15

years. The average age of all the students is .

Q. In a class there are 32 boys and 28 girls. The average age of the boys in the class is 14 years and the average age of the girls in the class is 13 years. What is the average age of the whole class? (Rounded off to two digits after decimal)

The average age of the students of a class is 15.8 years. The average age of boys in the class is 16.4 years and that of the girls is 15.4 years.
What is the ratio of the number of girls to the number of boys in the class?

Q. The average age of a class is

15.8

years. The average age of the boys in the class is

16.4

years while that of the girls is

15.4

years. What is the ratio of boys to girls in the class?

Q. In a class, the average age of girls is 21 yearsand the average age of boys is 4 years less than the average age of the entire class. Find the average age of the entire class, if the ratio of the number boys and girls is 3:4.

Join BYJU'S Learning Program

The average age of the boys in a class is 16 years and that of the girls is 15 years. The average age for the whole class when there are equal number of girls and boys is:

The correct option is B 15.5 yearsLet No of boys = No of girls = xAvg age of whole class = 16×x+15×xx+x=16+152=15.5 years

The average age of the boys in a class is $16$ years and that of the girls is $15$ years. The average age for the whole class when there are equal number of girls and boys is:

The correct option is B $15.5$ years
Let No of boys = No of girls = x
Avg age of whole class = $\frac{16 \times x + 15 \times x}{x + x}$
$= \frac{16 + 15}{2}$
$= 15.5$ years