Question

What is the mean of 10,20,30 and 40

Answer 1

mean mean is 25 because we will add all the numbers and divide how many numbers are there

Answer 2

$\huge \boxed{ \tt {{ \underline{ \purple{Answer : }}}}}$

$Mean = \frac{sum \: of \: all \: observation}{total \: no. \: of \: observation} \\ \\ \: = \frac{10 + 20 + 30 + 40}{4} \\ \\ = \frac{100}{4} \\ \\ = 25$