Question

Find Harmonic mean 1, 2, 3, 4, 5
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Answer 1

SOLUTION

TO DETERMINE

The Harmonic mean 1, 2, 3, 4, 5

EVALUATION

Here the given numbers are 1, 2, 3, 4, 5

Number of terms = 5

Hence the required Harmonic mean

$\displaystyle\sf{ = \frac{5}{ \frac{1}{1} + \frac{1}{2} + \frac{1}{3} + \frac{1}{4} + \frac{1}{5} } }$

$\displaystyle\sf{ = \frac{5}{ \frac{60 + 30 + 20 + 15 + 12}{60} } }$

$\displaystyle\sf{ = \frac{5 \times 60}{ 60 + 30 + 20 + 15 + 12 } }$

$\displaystyle\sf{ = \frac{300}{ 137 } }$

≈ 2.2

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