Question

The mean of given observations is:

C.I.	30-40	40-50
f	2	3

Options

• 41

• 27

• 71

• 91

Answer 1

41

Explanation:

C.I.	f	Mean value (x)	fx
30-40	2	35	70
40-50	3	45	135
Total	Σf = 5		Σfx = 205

By formula,

\[\text{Mean} = \frac{\Sigma fx}{\Sigma f} = \frac{205}{5} = 41.\]