A grocer's sales for five consecutive months were Rs. 5456, Rs. 5972, Rs. 5857, Rs. 5235, and Rs. 5526. What must his sales be in the sixth month to achieve an average sale of Rs. 6400?
Show answer & explanation
Correct answer: D
Explanation
Given:
Sales for the first 5 months = 5456, 5972, 5857, 5235, 5526
Average = 6400
According to the formula:
Total Sum = Average × Total number of months
Sum of the first 5 months = 5456 + 5972 + 5857 + 5235 + 5526 = 28046
Total sum for 6 months = 6400 × 6 = 38400
Sales for the sixth month = 38400 − 28046 = 10354 Rupees