Question

The mean of 25 observations is 36 out of these observations the mean of first 13 observation is 32 and that of the last 13 observation is 40 find the 13th observation.

Answer 1

Step-by-step explanation:

$13^{th} observation \\=13 \times 32 + 13 \times 40 - 25 \times 36 \\ = 416 + 520 - 900 \\ = 936 - 900 \\ = 36$

Answer 2

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