Question

Mean of numbers 10, 20, 30 and 40 is​

Answer 1

❒ Question :-

Mean of numbers 10, 20, 30 and 40 is ?

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❒ Used Formula :-

$\displaystyle \pink⇝\boxed{ \sf Mean = \boxed{ \sf\frac{Sum \: of \: Observations }{Total \: number \: of \: Observations}}}$

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❒ Solution :-

$\displaystyle \pink ⟹ \: \color{blue}\sf Mean = \frac{Sum \: of \: Observations }{Total \: number \: of \: Observations}$

$\displaystyle \pink ⟹ \: \color{blue}\sf Mean = \frac{10 + 20 + 30 + 40 }{4}$

$\displaystyle \pink ⟹ \: \color{blue}\sf Mean = \cancel\frac{100 }{4}$

$\displaystyle \pink ⟹ \: \large\colorbox{deeppink}{\color{blue}\bf Mean = 25}$

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Answer 2

• We have to evaluate the above expression by using the given data.

              Given data:- $10,20,30,\ and\ 40.$

              To find:- Value of mean.

              Solution:-

• We know that mean is an arithmetic average of all numbers.

               $mean=\frac{Sum\ of \ all \ number}{Total\ number\ of \ observation}$

              Therefore,

               $mean=\frac{10+20+30+40}{4} \\mean=\frac{100}{4} \\mean=25.$

           Hence we will get mean of $10,20,30,\ and\ 40$ is $25.$