Question

There are some students in the examination hall a and



b.To make the number of students equal in each hall,10 students are sent from a to



b. But if 20 students are sent from b to a , the number of students in a becomes double the number of students in



b. Find the number of students in the two halls

Answer 1

Step-by-step explanation:

firstly a

its double of b so,

a. b

2(x-10+20) x+10-20

2x-20+40. x-10

2x+20

by cross multiplication

(2x-x)=(-10+20)

x=30

so as A

30-10+20=40

its double of B

so as B

30+10-20=20