Question : 1 packet of biscuits costs Rs. 16, but a pack of 4 of the same packet of biscuits costs Rs. 56. What is the effective discount (in percent) on the pack?
Option 1: 8
Option 2: 10
Option 3: 7.5
Option 4: 12.5
Correct Answer: 12.5
Solution :
Marked price of 1 packet of biscuits = Rs. 16
Marked price of 4 packets of biscuits = Rs. 16 × 4 = Rs. 64
The selling price of a pack of 4 packets of biscuits = Rs. 56
Discount % = $\frac{\text{Effective discount}}{\text{Actual Marked Price}}$×100 = $\frac{(64 – 56)×100}{64}$ = $\frac{100}{8}$ = 12.5%
The effective discount on the pack is 12.5%.
Hence, the correct answer is 12.5%.
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