In a particular week, the average earning per day of a plumber from Monday to Wednesday remained ₹580 and that from Thursday to Saturday it was ₹612. If the average earning for the whole week was ₹675, then how much did he earn on Sunday?
Answer & explanation
Correct answer: option 4
average earning per day of a plumber from Monday to Wednesday i.e. 3 days = 580
Sum of earnings from Monday to Wednesday = 580*3
average earning per day of a plumber from Thursday to Saturday i.e. 3 days = 612
Sum of earnings from Monday to Wednesday = 612*3
Average of week = 675
(sum of Monday to saturday + earning on sunday)/7 = 675
(580*3 + 612*3) + earning on sunday = 675*7
earning on sunday = 4725 - 1740 - 1836 = 1149
The correct answer is Option (4) → ₹1149