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:
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 6 of 8.
PRAKASH said:
1 decade ago
I don't know how 2 was came at step 2.
Please explain.
Please explain.
Prakash said:
6 years ago
Could you please explain this? I am not getting it.
Prakash said:
6 years ago
Could you please explain this? I am not getting it.
Garry said:
7 years ago
Accroding to last condtion, It should be 2(x+20).
Swathi hj said:
6 years ago
Why we take x-10 and y+10, can anyone tell me?
(1)
Tuan said:
8 years ago
I don't understand this, please explain me.
Doss said:
1 decade ago
Dear friend explain with example.........
Musa said:
1 year ago
Anyone, please help me to get the answer.
(3)
Geethanjali said:
7 years ago
Simple to understand Thank you @Hiranmoy.
Shiv Mohan Sharma said:
8 years ago
Explain how to solve equ.1 and equ.2?
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