Question

31. If the mean of 9,18,27,x,45 is 27
then the value of x is​

Answer 1

mean = $\large\frac{sum of all observations}{no. of observations}$

27 = $\large\frac{9 + 18 + 27 + x + 45 }{5}$

27 = $\large\frac{99 + x}{5}$

27 × 5 = 99 + x

135 - 99 = x

x = $\large\boxed{36}$

Answer 2

Step-by-step explanation:

Given,

9,18,27,x,45 is 27

☆ mean= sum of all observations

_____________________

no. of all observations

=9+18+27+x+45

______________ = 27

5

=99+x/5=27

= 99+x=27(5)

= 99+x=135

= x=135-99

= x=36