Question

The average monthly salary of five friends is Rs. 62,000. Surinder, one of the five friends, got promotion and a hike in the salary. If the new average of their salaries is Rs. 64, 250, then how much is the increase in the monthly salary of Surinder?

• A. Rs. 14,250
• B. Rs. 11,250
• C. Rs. 73,250
• D. Rs. 12,150

Answer 1

Answer:

B. Rs. 11,250

Solution: Given: The average monthly salary of five friends is Rs. 62,000. The new average of their salaries after the promotion is Rs. 64, 250 Formula used: Average = Sum of observation/Total number of observation Calculation: The total salary of five friends is ⇒ 62000 × 5 = Rs. 310000 The total salary after the promotion is ⇒ 64250 × 5 = Rs. 321250 So, the increment the person gets is ⇒ 321250 - 310000 = Rs.11250 ∴ The increment he got is Rs. 11250. Shortcut Trick: Total change value = change in average × number of observations. So, Increment in salary is ⇒ (64250 - 62000) × 5 ⇒ 2250 × 5 = Rs. 11250 ∴ The increment he got is Rs. 11250.