Question

there are two examination halls A and B. if 12 pupils are sent from A to B the no. becomes same. if 11 pupils are sent from B to A, then no. of pupils in A is double than their no. in B. find no. of pupils in each room. ​

Answer 1

Answer:

So, the number of pupils in room A are 81. Hence the answer is 81 and 57. But that is not the case. It is that, if 11 pupils are sent from room B to room A, then the number of pupils in room A is double their number in B, in general case when the number of pupils in room A and B are x and y.

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Answer 2

Step-by-step explanation:

let the no of pupil in a room be x and in b be y

given,

x-12=y

(y-11)2=x

so (x-12) 2=x

2x-24=x

x=24

so y = 24-12=12 (ans)

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