alleryThe mean of 5 numbers is 12. What is the sum of the five numbers?
A17
B48
C60
D72
Answer & Solution
Correct answer: C. 60
1. Mean = sum divided by the number of observations.
2. So sum = mean x count = 12 x 5.
3. 12 x 5 = 60.
17 adds instead of multiplies, 48 uses 4 numbers and 72 uses 6 numbers.
_Source: Wikipedia, Arithmetic mean, Definition_
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