SSC CGL 18 Aug 2021 Shift 3 Paper

Question : 65 of 100

Marks: +1, -0

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 production on 19 and 20 December?

1058
513
529
512

Validate

Solution:

Total production in December

=31 × 512=15872

[ ∵ \;\text " Average "\;=\;{\;\text " Sum of terms "\;}/{\;\text " Total terms "\;}]

First 20 days total production

=20 × 515=10300

Last 13 days total production

=13 × 510=6630

on 19 and 20 December total production

=6630+10300-15872

=1058

∴

Average production on 19 and 20 December

=\;{1058}/{2}=529

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