railway RPF SI Mock Test Series 2024 Quantitative Aptitude Standard Deviation

তথ্যের সংকলনের চল হল 144। তাহলে তথ্যের মানক বিচ্যুতি (standard deviation) হ'ল: 

A. ±12

B. 12

C. 44

D. 72

1
A
2
B
3
C
4
D
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