Question

60+percent+of+students+in+a+school+are+boys.+Find+the+total+number+of+students+in+the+school+of+120+are+girls.

Answer 1

Step-by-step explanation:

Assumption: Let the total number of students in the school be x.

Also, (100 - 60)% = 40% of the students are girls.

We know, No. of girls = 120

So, According to the question,

40% of x = 120

=> 40/100 × x = 120

=> x = 120 × 100/40

=> x = 300

So, the total number of students in the school is 300

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Answer 2

Answer:

Let the total number of students be x.

Number of boys=60%of x=60x/100=3x/5

Number of boys + number of girls =x

3x/5+120=x

3x+600=5x

x=300