Question

Sum of four observations is 40, find the 5th observation if A.M. of all observations is 10

Answer 1

Step-by-step explanation:

sum of 1st four observation = 40

total mean of 5 = 50

so fifth no = 50 - 40 = 10

Answer 2

Step-by-step explanation:

As average remains the same after adding fifth observation, so the fifth observation is 10.