One set containing five members has mean 8, variance 18 and the second set containing three members has mean 8 and variance 24. The variance of combined set of numbers is

One set containing five members has mean 8, variance 18 and the second

1.	One set containing five members has mean 8, variance 18 and the second set containing three members has mean 8 and variance 24. The variance of combined set of numbers is
A.	24
B.	20.25
C.	22.25
D.	None of these
Answer» C. 22.25

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One set containing five members has mean 8, variance 18 and the second set containing three members has mean 8 and variance 24. The variance of combined set of numbers is

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