Question

What is the standard deviation of first n natural numbers?

A Sq rt [(N^2 -1)/12]
B Sq rt [(N-1)/12]
C Sq rt [(N+1)/12]
D Sq rt [N^2 /12]
E None of these
Practice Next

Hey! Ask a query

🎓
Think You're Ready for RBI Grade B?
RBI Grade B 2026 Phase 1 Memory Based Paper
  • 200 Questions with Detailed Solutions
  • Section-wise Coverage (GA, English, Quant & Reasoning)