ProbabilityMTP June 2023 Series IQuestion 2829 of 240
All Questions

In a poker set there are $90$ chips numbered from $1$ to $90$. Dan picks $3$ chips random, one after the other, without replacement. What is the probability that the numbers on the chips, in the order that the picks them are in descending order?

Options

A$\frac{1}{3}$
B$\frac{1}{30}$
C$\frac{1}{6}$
DNone
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Correct Answer

✅ Option b — $\frac{1}{30}$

All Options:

  • A$\frac{1}{3}$
  • B$\frac{1}{30}$
  • C$\frac{1}{6}$
  • DNone

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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