Question

The mean of a certain number of observation is 32. Find the resulting mean if each observation is multiplied by2

Answer 1

we have property that if observation is multiplied by any number then, the meany is also multiplied by that number 
Thus, here observation is multiplied by 2 so that by property mean is also multiplied by 2 
so we have resulting mean = 32*2 = 64

Answer 2

the mean of a certain no of observation is 32.
the answer is 32*2=64