Question

There are two examinations rooms P and Q. If 10 students are sent from P to Q, then the number of students in each room is the same. If 20 candidates are sent from Q to P, then the number of students in P is double the number of students in Q. The number of students in room Q is ?

Answer 1

Answer:

80

Step-by-step explanation:

If 'k' is number of students in P and 'l' is number of students in Q, then

From the given conditions, we have

=> k - 10 = l + 10 .......(1)

=> k + 20 = 2(l - 20) ....(2)

Solving these eqns, we get

k = 100 and l = 80.

Therefore, number of students in class Q is 80.

hope it helps