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If the mean of five observations `x , x+2, x+4, x+6, x+8 i s 11 ,` then the mean of first three observations is 9 (b) 11 (c) 13 (d) none of these

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If the mean of five observations `x , x+2, x+4, x+6, x+8 i s 11 ,` then the mean of first three observations is 9 (b) 11 (c) 13 (d) none of these
A. 5
B. 6
C. 7
D. 8
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Correct Answer - c
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