Question

In a class of 42 students, the number of boys is 2/5 of the giris. Find the number of boys and girls in the class.
Please explain it properly
Who explains properly will be given a brainliest answer​

Answer 1

let the number of boys be B

let the girls be G

)

B

+

G

=

42

(2)

B

=

2

5

×

G

Replacing

B

by (2) we get:

2

5

×

G

+

G

=

1

2

5

×

G

=

42

Turning

1

2

5

into a non-mixed fraction:

7

5

×

G

=

42

→

multiply by 5, divide by 7:

G

=

42

×

5

7

=

6

×

7

×

5

7

=

30

B

=

2

5

×

30

=

2

5

×

5

×

6

=

12