hamburger menu
All Coursesall course arrow
adda247
reward-icon
adda247
    arrow
    arrow
    arrow
    In an election between two candidates 90 % of the registered voters cast their vote and 15 % of the votes polled were found invalid. Winning candidate
    Question

    In an election between two candidates 90 % of the registered voters cast their vote and 15 % of the votes polled were found invalid. Winning candidate got 51% of the valid votes and won the election by a margin of 2142 votes. How many voters were registered?

    A.

    140000

    B.

    140002

    C.

    139999

    D.

    140001

    Correct option is A

    Given:

    90% of registered voters voted.

    15% of votes polled were invalid.

    Winning candidate got 51% of valid votes.

    Margin of victory = 2142 votes.

    Find total registered voters 

    Formula Used:

    Valid votes = (Total votes polled) × (1 − invalid %)

    Solution: 

    Let total registered voters  = N

    Votes polled = 0.90N

    Valid votes = 0.90N × 0.85 = 0.765N

    Margin = (51% − 49%) of valid votes = 2% of valid votes

    0.02 × 0.765N = 2142

    0.0153N = 2142

    N = 21420.0153 \frac{2142}{0.0153}​ = 140000

    Free Tests

    Free
    Must Attempt

    CBT-1 Full Mock Test 1

    languageIcon English
    • pdpQsnIcon100 Questions
    • pdpsheetsIcon100 Marks
    • timerIcon90 Mins
    languageIcon English
    Free
    Must Attempt

    RRB NTPC Graduate Level PYP (Held on 5 Jun 2025 S1)

    languageIcon English
    • pdpQsnIcon100 Questions
    • pdpsheetsIcon100 Marks
    • timerIcon90 Mins
    languageIcon English
    Free
    Must Attempt

    RRB NTPC UG Level PYP (Held on 7 Aug 2025 S1)

    languageIcon English
    • pdpQsnIcon100 Questions
    • pdpsheetsIcon100 Marks
    • timerIcon90 Mins
    languageIcon English

    Similar Questions

    test-prime-package

    Access ‘RPF Constable’ Mock Tests with

    • 60000+ Mocks and Previous Year Papers
    • Unlimited Re-Attempts
    • Personalised Report Card
    • 500% Refund on Final Selection
    • Largest Community
    students-icon
    370k+ students have already unlocked exclusive benefits with Test Prime!
    Our Plans
    Monthsup-arrow