Question

find the number of students​

Answer 1

Answer:

Let the number of students in each row be x

Let the number of rows be y

Therefore, the number of students would be x y

From first condition,

Number of students in each row = x + 3

Number of rows = y - 1

(y - 1) (x + 3) = x y

- x + 3 y = 3 ..............(1)

From the second condition,

Number of students in each row = x - 3

Number of rows = y + 2

(x - 3) (y + 2) = x y

2 x - 3 y = 6 .............(2)

On solving (1) and (2), we get,

x = 9 and y = 4

Therefore, Number of students = 36

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