BA LLB Banaras Hindu University 2017 Solved Paper

Directions (Q. Nos. 126-130)

Following questions are based on the five three-digit number given below.
528 739 846 492 375

Question : 129 of 170

Marks: +1, -0

The mean of 53 observations is 18 . If each observation is multiplied by

3 .

What will be the new mean?

Solution:

Given,

\ov{x}=18

and

n=53

So, sum of observation

=n \ov{x}=53 × 18

=954

New total of observation

=954 × 3=2842

∴

New mean

=\;{2862}/{53}=54

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