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If two positive numbers have A.M. 10 and G.M. 8, their sum is:
A18
B24
C20
D16
Answer & Solution
Correct answer: C. 20
1. The arithmetic mean is half the sum.
2. So the sum is twice the mean.
3. Twice 10 gives 20.
_Source: NCERT Class 11 Mathematics, Ch 8 'Sequences and Series'_
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