There are two examination rooms A & 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:
A
20
B
80
C
100
D
200
Correct Option:
C
Explanation
Let the initial numbers in rooms A and B be A and B. After 10 students move A → B:
