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SSC CHSL 2022 PYQ — Question 51

SSC CHSL - 25 May 2022 - Shift 3 • Quantitative Aptitude • Q51

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If the average of n quantities is P and the average of m quantities is Q, then the average of (m + n) quantities is:

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Correct answer: D

Explanation

The correct answer is Option 4 i.e. nP+mQm+n\frac{nP + mQ}{m + n}.

We know that,

Average = Sum of observations/Number of observations

Now,

Sum of n quantities = Pn

Sum of m quantities = Qm

Required average = nP+mQm+n\frac{nP + mQ}{m + n}