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