Question

In a school 45% of the students are girl. If there are 220 boys what is the no of students in the school ​

Answer 1

Answer:

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

ATQ - ($\frac{45}{100}$ × x) + 220 = x

          $\frac{9x}{20}$ + 220 = x

          220 = x - $\frac{9x}{20}$

220 = $\frac{20x - 9x}{20}$

220 = $\frac{11x}{20}$

$\frac{220 * 20}{11}$ = x

400 = x

So the total number of students in the class are 400.

Answer 2

Answer

LET, x be the total no. of students

then, x*55/100=220( no. of boys)

x = 22000/55

x= 400

therefore  , total no. of students are 400

hence , no. of girls are 180 (400 - 220 )

Step-by-step explanation: