Statisticsmedium · Past Paper
If the mean of 10, 15, x, 20, 25 is 18, find x.
A18
B20
C15
D22
✓ Correct Answer: B — 20
(10+15+x+20+25)/5 = 18 => 70+x = 90 => x = 20.
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✓ Correct Answer: B — 20
(10+15+x+20+25)/5 = 18 => 70+x = 90 => x = 20.
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