Question

29. The strength of a class is 300. If the number of boys is
increased by one-fifth of the total number of students and number
of girls is decreased by one-tenth of the total number of students
number of boys will exceed that of girls by 120. Find the numbers
of boys and girls
1 160,140 2.165.135 3. 130, 170 4.150.150​

Answer 1

Answer:

It is the answer of your question

option b

Answer 2

Answer:

2. 165, 135

Step-by-step explanation:

Total = 300

Let boy be x, girl be y.

x+y = 300

(x+ 300/5) - (y - 300/10) = 120

(x+60) - (y-30) = 120

x+60-y+30 = 120

x-y = 30

x = 30+y

30+2y = 300

2y = 270

y = 135

x = 30+135 = 165