railway RPF Constable Mock Test Series 2024 Quantitative Aptitude Progression Harmonic Progression

For two observations, the sum is S and product is P. What is the harmonic mean of these two observations?

1
\(\frac{2S}{P}\)
2
\(\frac{S}{(2P)}\)
3
\(\frac{2P}{S}\)
4
\(\frac{P}{(2S)}\)
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