Question

Lalit's average earning per month in the first three months of a year was ₹4080. In April, his earning was 75% more than the average earning in the first three months. If his average earning per month for the whole year is ₹66405, then what will be Lalit's average earning (in ₹) per month from May to December?

• A. 97184
• B. 97185
• C. 97180
• D. 97183

Answer 1

Answer:

B. 97185

Lalit's average earning per month from May to December will be ₹97,185.

1. Earnings for the First Three Months (Jan - Mar)

• Average earning per month = ₹4,080

• Total earnings for 3 months = $4080 \times 3 = \mathbf{12,240}$

2. Earnings for April

• April earnings were 75% more than the first 3 months' average.

• Increase amount = $75\% \text{ of } 4080 = \frac{75}{100} \times 4080 = 3,060$

• Total earning in April = $4080 + 3060 = \mathbf{7,140}$

3. Total Earnings for the First Four Months (Jan - Apr)

• Total = $12240 + 7140 = \mathbf{19,380}$

4. Total Earnings for the Whole Year (12 Months)

• Average earning per month for the year = ₹66,405

• Total yearly earnings = $66405 \times 12 = \mathbf{796,860}$

5. Average Earning from May to December (8 Months)

• Total earnings for these 8 months = Yearly total – First 4 months' total

• Total (May - Dec) = $796860 - 19380 = \mathbf{777,480}$

• Average per month (May - Dec) = $\frac{777480}{8} = \mathbf{97,185}$

Final Answer

Lalit's average monthly earning from May to December is ₹97,185.