railway RPF SI Mock Test Series 2024 Quantitative Aptitude Standard Deviation

डेटाच्या संचाची भिन्नता 144 आहे. नंतर डेटाचे मानक विचलन आहे:

A. ±12

B. 12

C. 44

D. 72

1
A
2
B
3
C
4
D
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