A grocer has a sale of ₹8,435, ₹8,927, ₹8,855, ₹9,230 and ₹8,562 in 5 consecutive weeks. How much sale must he have in the 6th week so that he gets an average sale of ₹8,500?
Show answer & explanation
Correct answer: C
Explanation
The correct answer is Option 3 i.e. ₹6991.
Let the sale for the 6th week be Rs. x
We know that,
Average = Sum of observations/Number of observations
Now,
⇒ 8500 = (8435 + 8927 + 8855 + 9230 + 8562 + x)/6
⇒ 8500 × 6 = 44009 + x
⇒ 51000 = 44009 + x
⇒ x = 51000 - 44009
⇒ x = 6991
Hence,
The sale required for the 6th week is Rs 6,991