Question

In a class of 30 children 40% are girls. how many more girls coming to this class would make them 50%

Answer 1

There are a number of ways to work the math on this.

60% = 60/100 = 3/5

3/5 * 25 or (3 * 25)/5 =

75/5 = 15

So the exact number is 15 boys, but the way the question is worded, it could be a trick question. It says 60% are boys, but does not specify that the other 40% are all not boys. In that case the answer would be:

15 <= number of boys <= 25

Answer 2

Answer: 6

Total students = 30

Girls = 40% of 30 = 12

Boys = 30 - 12 = 18

When 6 more girls coming to the class , num of girls = 18

That is equal to 50% of total strength of the class

Total strength will be 36

(18 boys + 18 girls)