Aptitude - Simplification - Discussion

Discussion Forum : Simplification - General Questions (Q.No. 2)
2.
There are two examinations rooms A and B. If 10 students are sent from A to B, then the number of students in each room is the same. If 20 candidates are sent from B to A, then the number of students in A is double the number of students in B. The number of students in room A is:
20
80
100
200
Answer: Option
Explanation:

Let the number of students in rooms A and B be x and y respectively.

Then, x - 10 = y + 10      x - y = 20 .... (i)

     and x + 20 = 2(y - 20)      x - 2y = -60 .... (ii)

Solving (i) and (ii) we get: x = 100 , y = 80.

The required answer A = 100.

Discussion:
75 comments Page 8 of 8.

Mmmm said:   1 decade ago
Tell me clearly. Please.

Suman said:   8 years ago
Well explained @Tamil.

Sagar said:   6 years ago
Thanks @Naga invy.

Sarvesh said:   6 years ago
Thank you @Naga.
(1)

Kaleem said:   6 years ago
Thank you all.


Post your comments here:

Your comments will be displayed after verification.