Question

A shopkeeper earns a profit of ₹2 by selling one marker pen and incurs a loss of ₹1 per eraser. 1. In the month of January, he incurs a loss of ₹5. In that month, he sold 40 marker pens. How many erasers did he sell in the month of January? 2. In the next month, he earns neither a profit nor a loss. If he sold 65 marker pens, how many erasers did he sell?

Answer 1

1. He sold 5 erasers in January

2. He sold 130 erasers.

Explanation:

1. ₹1 per eraser = ₹5 for 5 erasers

2. if you add opposites you get 0 So, ₹2 by selling one marker pen, loss of ₹1 per eraser. 65*2 is 130. So 130 erasers.