The average daily production of toys in a factory in the month of December is 512. If the average production during first 20 days is 515 and that of the last 13 days is 510, then what is the average of producion on 19 and 20 December?
Show answer & explanation
Correct answer: C
Explanation
The correct answer is option 3 i.e. 529.
There are 31 days in the month of December
Total production of toys in the month of December = 31 × 512 = 15872.
The total production of toys in the first 20 days = 20 × 515 = 10300.
The total production of toys in the last 13 days (from 19 to 31) = 13 × 510 = 6630
The sum of total production in first 20 days and the last 13 days = 10300 + 6630 = 16930.
Production of toys on 19 and 20 December = 16930 - 15872 = 1058
Average production of toys on the 19 and 20 December = 529.