Question

The mean of the numbers 10,20,30 and 40 is​

Answer 1

Answer:

25

Step-by-step explanation:

10+20+30+20÷4=25

Thanks

Answer 2

Given Number

• 10,20,30,40

To Find

• Mean

Solution

_____________________

We know that

$\sf{Mean = \dfrac{Sum~ Of~ Observation}{Number\ of\ Observation } }$

$\sf{~~~~\implies ~~Mean = \dfrac{10 + 20 + 30 + 40 }{4 } }$

$\sf{~~~~\implies ~~Mean = \dfrac{100 }{4 } }$

$\sf{~~~~\implies ~~Mean = 25 }$

Hence,

• The mean of the numbers 10,20,30 and 40 is 25.

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More to know

$\begin{gathered}{\sf{3Median=Mode+2Mean}}\\\end{gathered}$

$\begin{gathered}\\\boxed{\bf{Mean=\dfrac{\sum f_1 x_1}{\sum f_1}}}\end{gathered}$

$\begin{gathered}\begin{gathered}\begin{gathered}\\\begin{gathered} \sf{Median}\begin{cases}\sf{\:\;\; value \: of \: \left( \frac{n+1}{2}\right)^{th} observations \: if \: n \: is \: odd} \\ \\\sf{\;\;\; \cfrac{value \: of \: \left( \frac{n}{2}\right)^{th} observations + value \: of \: \left( \frac{n+1}{2}\right)^{th} observations} {2}\ if \ n \ is \ even}\end{cases}\end{gathered}\end{gathered} \end{gathered}\end{gathered}$

$\sf{Class\ Mark=\dfrac{Lower \ limit+ upper\ limit}{2}}$