Question

A data set of n observations has mean 2 x. While another data set of 2n observations has

mean x . Then the mean of the combined data set of 3n observations will be :

(a) x (b) X (c) 4/5 x (d) 3x/5
​

Answer 1

Answer:

4x/3

Step-by-step explanation:

n observations mean = 2x

sum of n observations =2nx

2n observations mean =x

sum of 2n observations =2nx

total n+2n=3n observations

total sum = 2nx+ 2nx =4nx

mean=4nx/3n = 4x/3

hope this helps