Question

vii)
Arithmetic mean 11, 12 and 13 will be:
(a) 11 (6) 12
(c) 13 (d) None of these​

Answer 1

$\textbf{Concept:}$

$\text{The mean of the numbers }x_1, x_2, x_3,........x_n$ $\text{is}$

$\overline{x}=\displaystyle\frac{x_1+x_2+......+x_n}{n}$

$\text{Now,}$

$\text{The mean of 11, 12, 13 }=\displaystyle\frac{11+12+13}{3}$

$=\displaystyle\frac{36}{3}$

$=\displaystyle\;12$

$\therefore\textbf{option (b) is correct}$

Find more:

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