Question

There are 40 students in a class. The number of girls is
10 more than the number of boys. How many girls are
there in the class?
a. 15
b. 20
c. 25
d. 30
solution with explain​

Answer 1

Answer:

no. of girls = 25

Step-by-step explanation:

please refer the attachment for procedure

Answer 2

Answer:

The no. of girls in the class is c.25.

Step-by-step explanation:

Let no.of boys be x

and no.of girls be y.

From first condition,

x+y=40. -1

From second condition,

No.of girls=no.of boys +10

y=10+x

Therefore,

x-y=-10. -2

So add eqn 1 and 2

we get,

x+y=40

+x-y=-10

2x = 30

x=15

Put x=15 in eqn.1

x+y=40

15+y=40

y=40-15

y=25

Ans. The total no. pic girls in the class is 25.

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