Question

In the sixth standard of a school, 55% of the students are boys. If there are 144 girls, how
many boys are there?
​

Answer 1

Answer:

176

Step-by-step explanation:

45% of x = 144

x= 320. out of which 144 are girls do boye are 176

Answer 2

Question : In a class of students, 55% of the students are boys. If there are 144 girls, how many boys are there?

Answer :-

Number of girls = 144

Let the number of students be x.

Hence we can write it as,

$144 + \frac{55}{100} x = x$

$\frac{55}{100} x - x = - 144$

$\frac{55 x - 100x}{100} = - 144$

$- 45x = - 14400$

$x = \frac{ - 14400}{ - 45}$

$x = 320$

Hence there are 320 students in the class.

Number of boys = 320 - 144 = 176.

Food for thought :-

• We are first calculating the number of students by adding the 144 girls with 55/100 times x to calculate the magnitude of boys in the class.
• Then we are subtracting the girls from total amount of students to find the number of boys.