Question

In a class of 49 students number of girls are 2/5 of the boys. then the number of boys in the class​

Answer 1

Answer:

If 2/5 are boys then 3/5 are girls

These added together equal 5/5 which is the total number in the class ( 45 in this example )

45 divided by 5 equals 9

3 fifths would be 3 x 9 = 27 girls

The other way is to let x = number of girls

multiply 45 ( total # students) by (3/5)

x = 45 (3/5)

x = 135/5 = 27 girls

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Answer 2

Answer:

35 boys

Step-by-step explanation:

We can give the variables g and b to the number of girls and boys respectively. We get

2g:5b = 49

So, we get our answer:

35 boys