PYQPulse
HomeMocksPracticePYQsDashboard
PYQPulse

Timing-accurate mock tests and PYQs for SSC, Banking and Railway exams — so the real paper feels like a revision.

Exams

  • SSC exams
  • Banking exams
  • Railway exams
  • All exams

Practice

  • Practice questions
  • Mock test series
  • Sectional tests
  • Year-wise PYQs
  • Performance analytics

Company

  • About us
  • Help Centre
  • Pricing
  • Sign in

Legal

  • Privacy Policy
  • Terms of Service

Contact

  • hello@testwala.co.in
  • Telegram
  • +91 62816 87760

Practice interface modeled on the official exam pattern — not the official examination. PYQPulse is not affiliated with the Staff Selection Commission, IBPS, SBI, RBI, NABARD, SEBI or Indian Railways.

© 2026 PYQPulse. All rights reserved.

Built for aspirants, by aspirants.

HomeMocksPracticeStats
  1. Home
  2. ›
  3. PYQs
  4. ›
  5. BPSC (Bihar PCS)
  6. ›
  7. 2015
  8. ›
  9. Q111

BPSC (Bihar PCS) 2015 · Question 111 of 135

The variance of 7, 7, 7, 7, 7 is

Miscellaneous

  1. A7
  2. B0Correct
  3. C3
  4. D4

Answer: B. 0

Explanation

Given: The variance of 7, 7, 7, 7, 7 Formula used: Variance = summation (x - x̅ ) 2/number of observation Calculation: According to the question, Mean = (7 + 7 + 7 + 7 + 7)/2 ⇒ x̅ = 35/5 = 7 All observation are same then summation (x - x̅ ) 2 = 0 Variance = 0/5 ⇒0 ∴ The variance of 7, 7, 7, 7, 7 is

Source: prepp.in

← Q110View full paper (135 questions)Q112 →

Practice the full BPSC (Bihar PCS) 2015 paper

Timed test with all 135 questions, just like the real exam.

Start test