Statisticsmedium · Past Paper
If the mean of x, x+3, x+6, x+9, x+12 is 10, find x.
A2
B4
C6
D8
✓ Correct Answer: B — 4
Mean = Sum/5. 10 = (5x + 30)/5 => 10 = x + 6 => x = 4.
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