Question

in a class of 42 students the number of boys is 2 by 5 of the girls .find the number of boys and girls in the class.​

Answer 1

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Let the number of girls be x

Since we are given that the number of boys is 2/5 of the girls

So, Number of boys = 2x/5

There are 42 students in total.

So, x+(2x/5)=42

7x/5=42

7x=210

x=30

Thus the number of girls is 30 .

Number of boys = 2x/5=(2*30)/5=60/6=12

Thus the number of boys = 12

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Answer 2

Answer:

students in class=42

ratio of boys to girls=2 by 5

number of boys =(2+5)

=42÷7=6

=6×2=12 boys

number of girls=(2+5)

=42÷7=6

=6×5=30

Step-by-step explanation:

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