Correct Answer - Option 1 : Rs. 4990
Given:
Five consecutive sale = Rs. 6435, Rs. 6927, Rs. 6856, Rs. 7230, Rs. 6562
Six consecutive months average sale = Rs. 6500
Formula used:
Average = sum of values/Number of values
Calculation:
Let sale of six month be Rs. x
Sum of sales of six months = Rs. (6435 + 6927 + 6856 + 7230 + 6562 + x)
⇒ Rs. (34010 + x)
Number of months = 6
Average of sales of 6 consecutive months = Rs. (34010 + x)/6
⇒ Rs. 6500 = Rs. (34010 + x)/6
⇒ 6 × 6500 = 34010 + x
⇒ 39000 = 34010 + x
⇒ x = (39000 – 34010)
⇒ x = 4990
∴ Rs. 4990 sale must he have in the six month so that he gets an average sale of Rs. 6500