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

दि एक वितरण का मानक विचलन 7 है, और माध्य 38.5 है, गुणांक भिन्नता ज्ञात कीजिए।

1
19%
2
21%
3
16%
4
18.18%
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