Correct Answer - Option 3 : Rs 20,000

**Given**

Total fees of brothers and sisters= Rs 55,000

Average fees of sisters = Rs.5,000

Formula used

Average = (sum of all observation)/Number of observation

**Calculation**

Fees of 3 sisters = 3 × 5000

⇒ 15000

Fees of 2 brothers = 55,000 - 15,000

⇒ 40,000

Average fees of 1 brother = 40,000/2

⇒ Rs 20,000

**∴ Average fees of brother is Rs.20,000**