Question

Abhay working in Tele Bharti as a salesperson. His monthly salary is just Rs. 200. But he gets the bonus as per the given rule. If he sells the sim cards of Rs. x, then his bonus will be $[{\left(\frac{x}{100}\right)}^2+10]$. In the first quarter of the year, his average sale was Rs. 3000 per month. In the next 5 months, his average sale was Rs. 5000 per month. In the last four months, his average sale was Rs. 8000 per month. What is the average earnings per month for the whole year?

• A. Rs. 3350
• B. Rs. 3610
• C. Rs. 3560
• D. none of these

Answer 1

The correct option is B Rs. 3610

Average bonus for the first 3 months $={\left(\frac{3000}{100}\right)}^2+10=910$
Average bonus for the next 5 months $={\left(\frac{5000}{100}\right)}^2+10=2510$
Average bonus for the last 4 months $={\left(\frac{8000}{100}\right)}^2+10=6410$
His average bonus for the whole year
$=\frac{910\times 3+2510\times 5+6410\times 4}{12}=Rs.3410$
Hence his average earning per month
= 3410 + 200 = Rs. 3610