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%**