Question

Let mean and variance of the data 1, 2, 4, 5, x, y are 5 and 10 respectively. Then mean deviation about the mean of data is

(1) 5/2 

(2) 7/2 

(3) 5/6 

(4) 7/6

Answer 1

Correct option is (1) 5/2 

Now, mean deviation about mean