Find the average of 12, 15, 18, 21 and 24.
A20
B15
C18CORRECT
D21
Common EntranceMathematicsAverage
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Why the answer is C, and why the others tempt you.
Sum = 12 + 15 + 18 + 21 + 24 = 90; 90 / 5 = 18.
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