Statisticsmedium · Past Paper
If the mean of five observations x, x+2, x+4, x+6, and x+8 is 11, find the value of x.
A5
B7
C9
D11
✓ Correct Answer: B — 7
Sum = 5x + 20. Mean = (5x + 20)/5 = x + 4. Given x + 4 = 11, so x = 7.
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