alleryThe mean of two rational numbers a and b is (a + b)/2. The mean of 1/3 and 1/2 is:
A1/5
B5/12
C2/5
D3/12
Answer & Solution
Correct answer: B. 5/12
Mean = [(1/3) + (1/2)] / 2 = (2/6 + 3/6) / 2 = (5/6)/2 = 5/12. This lies exactly between 1/3 and 1/2 — a useful way to find a rational between any two given rationals.
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