imo class 12 probability

An urn has 5 Red and 3 Black balls. If 2 balls are drawn with replacement, the expected mean number of Red balls drawn is:

VAVidaara Admin Asked 6d ago 0 views 0 answers

An urn has 5 Red and 3 Black balls. If 2 balls are drawn with replacement, the expected mean number of Red balls drawn is:

  • A. 5/4
  • B. 5/8
  • C. 10/7
  • D. 1.5

Answer: A) 5/4

Explanation: This follows a binomial distribution where n = 2 and p = 5/8. Mean = np = 2 × (5/8) = 10/8 = 5/4.

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