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The school fees of 2 brothers and 3 sisters is Rs 55,000. The average fees of sisters is Rs 5000. Find the average fees of 1 brother.
1. Rs 10,000
2. Rs40,000
3. Rs 20,000
4. Rs.45,000

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Best answer
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

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