The number of boys in a class is 30 and the number of girls is x. The mean of the number of boys and girls is 35.
If the number of girls is increased by 10 , what will be the new Mean?

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

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

42.5

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

Open in App

Solution

The correct option is B
40

The number of girls are given as x

$\frac{x + 30}{2}$ = 35

$\Rightarrow$ x + 30 = 70

$\Rightarrow$ x = 40

If the number of girls is increased by 10 , their numbers become 40 + 10 = 50

The New Mean = $\frac{30 + 50}{2}$ = $\frac{80}{2}$ = 40

Suggest Corrections

Similar questions

Q. The number of boys in a class is 30 and the number of girls is x. The mean of the number of boys and girls is 35.
If the number of girls is increased by 10 , what will be the new mean?

In a school, the number of boys and girls are in the ratio of 4:7. If the number of boys is increased by 25% and the number of girls is increased by 15%, what will be the new ratio of the number of boys to that of girls?

Q. Suppose there are 30 Girls and 60 Boys in a class. 15 new boys and 10 new girls have been admitted into the class. What is the new ratio of the number of girls to the number of boys in the class?

Q. In the class, there are 39 boys and 65 girls. If the number of boys increased by 9 and the number of girls decreased by 5, then what is the ratio of the number of boys to the number of girls in class?

Q. In a class of

35

students, the number of girls is

20

. The ratio of number of boys to the number of girls in the class is

Join BYJU'S Learning Program

The number of boys in a class is 30 and the number of girls is x. The mean of the number of boys and girls is 35. If the number of girls is increased by 10 , what will be the new Mean?

The correct option is B 40 The number of girls are given as x x+302 = 35 ⇒ x + 30 = 70 ⇒ x = 40 If the number of girls is increased by 10 , their numbers become 40 + 10 = 50 The New Mean = 30+502 = 802 = 40

The number of boys in a class is 30 and the number of girls is x. The mean of the number of boys and girls is 35.
If the number of girls is increased by 10 , what will be the new Mean?

The correct option is B
40

The number of girls are given as x

$\frac{x + 30}{2}$ = 35

$\Rightarrow$ x + 30 = 70

$\Rightarrow$ x = 40

If the number of girls is increased by 10 , their numbers become 40 + 10 = 50

The New Mean = $\frac{30 + 50}{2}$ = $\frac{80}{2}$ = 40