railway RRB Technician Grade 1 Mock Test 2024 Mathematics Statistics Variance and Standard Deviation

यदि भिन्नता का गुणांक 75x2 और समांतर माध्य \(\rm \frac{20}{x}\) है तो मानक विचलन ______ है।

1
15x
2
5x
3
\(\rm \frac{15}{x}\)
4
\(\rm \frac{5}{x}\)
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