Question

The mean of the following series is 28. Find the value of x.

8, 22, 60, x, 35, 31, 9, 8, 12, 45

1. 60
2. 80
3. 70
4. 50

Answer 1

Correct Answer - Option 4 : 50

Concept:

Mean of n elements = \(\rm \text{Sum of all n elements}\over\text{Total number of elements (n)}\)

Calculation:

Mean = 28, Total elements = 10

\(\rm8+22+60+x+35+31+9+8+12+45\over10\) = 28

230 + x = 280

x = 50