Teaching DSSSB PGT Mock Test 2025 Mathematics Statistics Variance and Standard Deviation

यदि माध्य और गुणांक भिन्नता क्रमशः 37 और 37% है। मानक विचलन ज्ञात कीजिए।

1
13.69
2
12.59
3
13.29
4
12.66
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