Correct Answer - Option 1 : 20% gain
Given:
CP of an article = Rs. 7200
Loss% = 20%
Gain% = 50%
Concept used:
Gain% = (SP – CP)/CP × 100%
Loss% = (CP – SP)/CP × 100%
Calculation:
CP of an article = Rs. 7200
Loss% = 20%
SP of article = Rs. (80 × 7200/100) = Rs. 5760
Now, CP of the other article = Rs. 5760
Gain% = 50%
SP of the other article = Rs. (150 × 5760/100) = Rs. 8640
Overall gain = Rs. (8640 – 7200) = Rs. 1440
Overall gain% = 1440 × 100/7200 = 20%
∴ Overall gain is 20%