Let \[{{x}_{1}},\,{{x}_{2}},....,{{x}_{n}}\] be n observations such that \[\sum x_{i}^{2}=400\] and \[\sum x_{i}^{{}}=80\]. Then a possible value of n among the following is [AIEEE 2005]

Let \[{{x}_{1}},\,{{x}_{2}},....,{{x}_{n}}\] be n observations such th

1.	Let \[{{x}_{1}},\,{{x}_{2}},....,{{x}_{n}}\] be n observations such that \[\sum x_{i}^{2}=400\] and \[\sum x_{i}^{{}}=80\]. Then a possible value of n among the following is [AIEEE 2005]
A.	9
B.	12
C.	15
D.	18
Answer» E.

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Let \[{{x}_{1}},\,{{x}_{2}},....,{{x}_{n}}\] be n observations such that \[\sum x_{i}^{2}=400\] and \[\sum x_{i}^{{}}=80\]. Then a possible value of n among the following is [AIEEE 2005]

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