UPSC Prelims 2011·CSAT·Quantitative Aptitude·Combinatorics and Probability

In a survey regarding a proposal measure to be introduced, 2878 person took part of which 1652 were males. 1226 persons voted against the proposal which 796 were males. 1425 persons vote for the proposal. 196 females wet undecided. How many males were undecided ?

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Last updated 23 May 2026, 3:31 pm IST
  1. A31Correct
  2. B227
  3. C426
  4. D581

Explanation

Here's a step-by-step explanation: 1. Calculate the total number of undecided persons: Total participants = 2878 Persons who voted for = 1425 Persons who voted against = 1226 Total decided persons = 1425 + 1226 = 2651 Total undecided persons = Total participants - Total decided persons = 2878 - 2651 = 227 2. Calculate the number of males who were undecided: Total undecided persons = 227 Females who were undecided = 196 (given) Males who were undecided = Total undecided persons - Females who were undecided = 227 - 196 = 31 Therefore, 31 males were undecided. Analyzing the options: A) 31: This is the correct number of undecided males. B) 227: This is the total number of undecided persons (males + females), not just males. C) 426: This number does not directly correspond to any calculated value in the problem. D) 581: This number does not directly correspond to any calculated value in the problem. The final answer is A.
Quantitative Aptitude: In a survey regarding a proposal measure to be introduced, 2878 person took part of which 1652 were males. 1226 persons

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