What is the arithmetic mean of 25.2, 13.5, 18.5 and 34.8?

(a) $13.5$ (b) $23$ (c) $18$ (d) $34.8$

2 Answers
Aug 22, 2016

b) 23

Explanation:

Mean

$= \frac{25.2 + 13.5 + 18.5 + 34.8}{4}$

$= \frac{92}{4}$

$= 23$

Aug 22, 2016

The answer is (b) $23$.

Explanation:

The arithmetic mean is sum of all the data points or numbers divided by their number.

Here we have four data points / numbers which are $25.2$, $13.5$, $18.5$ and $34.8$.

Their sum is

$25.2 + 13.5 + 18.5 + 34.8 = 92.0$ and their arithmetic mean is $\frac{92.0}{4} = 23$.

Hence, answer is (b) $23$.