Question

In a class of 30 students the number of girls is
1/5th of the number of the boys.
How many boys are there in the class?
(A)25
(B)18
(C)20
(D)19​

Answer 1

Answer:

A ] 25

Step-by-step explanation:

Let the number be x

Boys = x

Girls = 1/5x

So,

x + 1/5 * x = 30

According to the rule, LHS = RHS:

5x + 1x/5 = 30

Make the denominator of x same for the fraction ( LCM )

6x / 5 = 30

6x = 5 (30)

6x = 150

x = 150/6

x = 25

Answer 2

Step-by-step explanation:

No. Of Boys = 4×30/5

= 20

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