Question

In a school, there were 500 boys and 600 girls in class five last year. The number of boys decreased by 10% and the number of girls increased by 9% this year. Find the number of girls this year.

Answer 1

Answer :-

Given :-

• Number of girls in last 5 years = 600
• Number of girls is increased by 9% this year

To Find :-

• Number of girls this year

Solution :-

Here, we are given that there were 600 girls in last 5 years, and this year number of girls is increased by 9%. So, we can find number of girls which will be 9% of 600.

Number of girls increased this year = 600 × 9%

= 600 × 9/100

= 6 × 9

= 54

Number of girls increased this year = 54

Number of girls this year = Number of girls in last 5 years + Number of girls increased this year

= 600 + 54

= 654

Number of girls this year = 654

Answer 2

A N S W E R :

• The number of girls this year is 654.

Given :

• Number of girls in last 5 years = 600

• Number of girls is increased by 9% this year

To find :

• Find the number of girls this year ?

Solution :

• Boys decreased by 50 and girls increased by 54

The number of total boys is 500,

So,

• (10/100) × 500 = 50

=> Current, No. of boys is 500 - 50 = 450

=> No. of girls is 600,

=> It is increased by 600,

=> 9/100 × 600 = 54

Therefore,

• The total number of girls this year is 600 + 54 = 654

Hence,

• The number of girls this year is 654.