- 11.30%
- 12.25%
- 13.37%
- 12.52%

Option 1 : 11.30%

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**Given****∶**

Common gain% = 11/2%

**Formula Used****∶**

Gain% = [(100 + common gain%)^{2}/100] – 100

**Calculation****∶**

Common gain = 11/2%

By using formula, we get

Gain% = [(100 + 11/2)^{2}/100] – 100

⇒ [{(200 + 11)/2}^{2}/100] – 100

⇒ [(44521/4)/100] – 100

⇒ [(44521/400)] – 100

⇒ 4521/400 = 11.30%.

**∴ ****Her total gain% is 11.30%. **

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