Amal purchases some pens at ₹ 8 each. To sell these, he hires an employee at a fixed wage.
He sells 100 of these pens at ₹ 12 each. If the remaining pens are sold at₹ 11 each, then he
makes a net profit of ₹ 300, while he makes a net loss of ₹ 300 if the remaining pens are sold
at ₹ 9 each. The wage of the employee, in INR, is

Answer

Let total number of pens be X and wage of employee be W

Now according to 1st case , profit = SP - CP
Here SP = 12*100 + 11(X-100) = 11X + 100
and CP = 8X + W
Hence, 300 = 11X + 100 - 8X - W
=> W = 3X - 200 ---(1)

According to 2nd case, Loss = CP - SP,
Here SP = 12*100 + 9(X-100) = 9X + 300 and CP = 8X + W and Loss = 300
=> 8X + W - 9X - 300 = 300

From (1), W = 3X - 200 and putting in above eqn.
=> 8X+3X-200-9X-300 = 300
=> X = 400
and W = 3*400-200 = 1000

Hence W = Rs 1000