A data set of `n` observations has mean ` 2\overset { - }{ x }` while another data set of ` 2n` observations has mean `

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Q 3023301241.     A data set of `n` observations has mean ` 2\overset { - }{ x }` while another data set of ` 2n` observations has mean ` \overset { - }{ x }`. The mean of the combined data set of ` 3n` observations will be equal to:
A

`\overset { - }{ x }`

B

`\frac { 3 }{ 2 } \overset { - }{ x }`

C

`\frac { 2 }{ 3 } \overset { - }{ x }`

D

`\frac { 4 }{ 3 } \overset { - }{ x }`

HINT


Solution
(Provided By a Student and Checked/Corrected by EXXAMM.com Team)

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