Question : Mona purchased two sets of jewellery for INR 4,000 each. She sold these sets of jewellery, gaining 8% on one and losing 6% on the other. Calculate her total loss or gain in this whole transaction.
Option 1: INR 120 gain
Option 2: INR 80 gain
Option 3: INR 80 loss
Option 4: INR 120 loss
Correct Answer: INR 80 gain
Solution :
Mona purchased two sets of jewellery for INR 4,000 each.
She sold these sets of jewellery, gaining 8% on one.
Selling price = $\frac{100+ \text{Profit}\%}{100}×$ Cost price
So, selling price is $\frac{108}{100}×4000$ = INR 4320
She sold the 2nd set of jewellery at a loss of 6%.
Selling price = $\frac{100- \text{Loss}\%}{100}×$ Cost price
So, selling price is $\frac{94}{100}×4000$ = INR 3760
Total selling price = (4320 + 3760) = INR 8080
$\therefore$ Her profit is (8080 – 8000) = INR 80
Hence, the correct answer is INR 80 gain.
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