Question

the mean of 26,28,25,x,24 is 27. Find the value of x

Answer 1

Mean = $\dfrac{\textbf{sum of observations }}{\textbf{Number of observations }}$





Given the question : —



Observations : 26,28,25,x,24


Mean : 27


Sum of observations : 26 + 28 + 25 + x + 24

Sum of observations :103 + x


Number of observations : 5




applying formula and substituting all the values



27 = $\dfrac{103+x}{5}$


27 × 5 = 103 + x


135 = 103 + x


135 - 103 = x


32 = x



Therefore the value of x is 32.

Answer 2

Mean =Sum of observations/No. of observations

Sum of observations=26+28+25+x+24
=103+x
No. of observations =5



Therefore,
27=103+x/5
135=103+x
x=135-103
x=32