1.

there are 2 examination room a and room b. if 10 students are sent from a to b,then the number of students in each room is same. if 20 canidates 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 in a is!

Answer» LET the number of students in ROOMS A and B be XAND 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.




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