A shopkeeper buys some notebooks at the rate of 12 for Rs. 222, and an equal number of notebooks at 10 for Rs. 225. If he sells all the notebooks at a profit of 20%, then the selling price of 15 notebooks is:
Show answer & explanation
Correct answer: A
Explanation
The correct answer is option 1 i.e. Rs. 369
According to the question
Buy At 12 = 222 Rs .......(1
Buy At 10 = 225 Rs ........(2
For making rates equal equation (1) × 5 & equation (2) × 6
Buy at 60 = 1110 Rs
Buy at 60 = 1350 Rs
Total at 120 = 2460 Rs
Profit = 20%
S.P of 1 notebook = (2460/120) × 6/5
= 123/5 Rs
S.P of 15 notebook = 15 × 123 /5 = 369 Rs