A) \[\frac{3+7+8+10+14}{5}\]
B) \[\frac{1}{3}+\frac{1}{7}+\frac{1}{8}+\frac{1}{10}+\frac{1}{14}\]
C) \[\frac{\frac{1}{3}+\frac{1}{7}+\frac{1}{8}+\frac{1}{10}+\frac{1}{14}}{4}\]
D) \[\frac{5}{\frac{1}{3}+\frac{1}{7}+\frac{1}{8}+\frac{1}{10}+\frac{1}{14}}\]
Correct Answer: D
Solution :
\[\text{H}\text{.M}.=\frac{n}{\frac{1}{{{x}_{1}}}+\frac{1}{{{x}_{2}}}+.....+\frac{1}{{{x}_{n}}}}=\frac{5}{\frac{1}{3}+\frac{1}{7}+\frac{1}{8}+\frac{1}{10}+\frac{1}{14}}\].
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