M4maths Previous Puzzles

14 Sep 2020 Cost Price

If the cost price of a Mobile is first decreased by 25% and then increased by 20%, then the net change in the price will be :

OPtion

1) 9%
2) 5%
3) 12%
4) 11%
5) 12.5%
6) 6%
7) 8%
8) 7%
9) 10%
10) None of these

Solution

Let the original price be Rs. 100.

New final price = 120 % of (75 % of Rs. 100) = Rs. [(120/100) * (75/100) * 100] = Rs. 90.

Decrease = 10%

Correct Option: 9 Best Solution (6)