Question

In a school 4/9 of the students are boys and the number of girls is 775.Find number of boys in the school.

Answer 1

Answer: 620

Step-by-step explanation:

Let m be the total no of students. 4/9 are boys means 5/9 are girls

5m/9=775

m/9=155

No of boys= 4m/9

= 4x155

= 620

Answer 2

Let, the total number of students be, 'y'

∴ The number of boys =(y×4/9)

                                     = 4y/9

∴ The number of girls =(y-4y/9)

                                     = (9y-4y)/9

                                     = 5y/9

By condition,

5y/9 = 775

⇒ y = (775×9)/5

⇒ y = 155 × 9

⇒ y = 1395

∴ The number of boys = (1395×4/9)

                                       = 155×4

                                        = 620

(Ans): 620 boys.