Question

Nandlal bought 20 dozen notebooks at ₹156 per dozen. He sold 8 dozens of them at 10% gain and
the remaining 12 dozens at 20% gain. What is his gain per cent in the whole transaction?
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Answer 1

Answer:

CP of 12 notebooks = Rs 48

CP of 1 notebook = Rs 48/12

CP of 240 notebooks = Rs 4 x 240 = Rs 960

CP of 96 notebooks = Rs 4 x 96 = Rs 384

CP of 144 notebooks = Rs 4 x 144 = Rs 576

Gain on 96 notebooks = 10% of Rs 384 = Rs 38.4

Gain on 144 notebooks = 20% of Rs 576 = Rs 115.2

Total gain = Rs 38.4 + Rs 115.2 = Rs 153.6

Step-by-step explanation:

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