ProbabilityMTP March 22Question 3386 of 170
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The probability that there is at least one error in an account statement prepared by 3\displaystyle 3 persons A, B and C are 0.2\displaystyle 0.2, 0.3\displaystyle 0.3 and 0.1\displaystyle 0.1 respectively. If A, B and C prepare 60\displaystyle 60, 70\displaystyle 70 and 90\displaystyle 90 such statements, then the expected number of correct statements

Options

A170\displaystyle 170
B176\displaystyle 176
C178\displaystyle 178
D180\displaystyle 180
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Correct Answer

Option c178\displaystyle 178

All Options:

  • A170\displaystyle 170
  • B176\displaystyle 176
  • C178\displaystyle 178
  • D180\displaystyle 180

About This Chapter: Probability

Paper

Paper 3: Quantitative Aptitude

Weightage

5-7 Marks

Key Topics

Probability Operations, Expected Value

A logic-heavy chapter dealing with random experiments, events (mutually exclusive, exhaustive), set theory probability, conditional probability, and Bayes' Theorem. It forms the basis for Theoretical Distributions.

View Official ICAI Syllabus

Exam Strategy Tip

Always draw a quick Venn Diagram or tree when faced with 'At least one' or 'Only A but not B' wording. It saves you from double-counting.

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