A man sold two gifts at ₹30 each. On one gift he gained 18%, and on the other gift he lost 18%. What is his over all gain/loss (in ₹)?

Loss of ₹2.00

According to the question,

Total SP = 30 × 2 = 60

CP of first gift = 30 × ($\frac{100}{118}$ ) = 25.42

CP of second gift = 30 × ($\frac{100}{82}$) = 36.58

Total CP = 25.42 + 36.58 = 62

Loss = 62 – 60 = Rs. 2