Question

Ram bought 2 phones for Rs 4000 each. He sold one at a gain of 20% and the other at a loss of 10%. Find the profit or loss percentage on the whole.​

Answer 1

Answer:

RAM would have had a profit of 400 rs

4000 + 4000 = 8000

1 phone sold for 20% profit = 4000 + 20% = 4800

phone sold for 10% loss = 4000 - 10% = 3600

4800 + 3600 = 8400

his investment = 8000

profit = 8400 - 8000 = 400 rs profit

Answer 2

Answer:

Now for 20% profit means article of 20 is sold at 24, and 20% loss means article of 30 sold at 24. So total CP is 50 and total SP will be 48. So there is loss of 4%.

In question given above total SP is 4800 but I have taken 48. Hence CP as per question should be 5000 (100 times of what I have initially taken). So total loss is 4% of 5000 that is 200.

These all are mental calculations, just by reducing problem to simple numbers that can be easily calculated mentally.

Let me know

Thanks.

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