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Question 270007
JEE Mathematics · Medium

Probability: Bayes theorem MCQ

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Bayes theoremMediumQuestion 270007

Question

A bag has 3 red and 2 blue balls. Two balls drawn without replacement. P(2nd is red | 1st is red) is:
  1. A
    2/4
    Correct
  2. B
    3/5
  3. C
    2/5
  4. D
    1/2

Correct answer

2/4

Explanation

After drawing 1 red ball, remaining: 2 red + 2 blue = 4 balls. P(2nd red | 1st red) = 2/4 = 1/2.

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