ProbabilityPYQ Dec. 21Question 3399 of 170
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Assume that the probability for rain on a day is 0.4\displaystyle 0.4. An umbrella salesman can earn Rs 400\displaystyle \text{Rs } 400 per day in case of rain on that day and will lose Rs 100\displaystyle \text{Rs } 100 per day if there is no rain. The expected earnings in (in Rs \displaystyle \text{Rs }) per day of the salesman is

Options

A200\displaystyle 200
B200\displaystyle 200
C100\displaystyle 100
D0\displaystyle 0
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Correct Answer

Option a200\displaystyle 200

All Options:

  • A200\displaystyle 200
  • B200\displaystyle 200
  • C100\displaystyle 100
  • D0\displaystyle 0

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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