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Two cards are drawn successively without replacement from a well shuffled deck of cards.Find the mean and standard variation of the random variable X where X is the number of aces.

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  • \(A\;pack\;of\;52\;cards\;contain\;4\;aces\)
  • \(In\;a;toss\;of\;dies\;twice\)
  • \(X=\;no\;of\;aces\)
  • \(X=(0\;1\;2\;)\)
  • \(Mean\;=\sum\;P_i\;X_i\)
  • \(\sigma\;=\sqrt{variance}=\sqrt{\sum\;P_iX^2_i\;-\;(\sum\;P_iX_i)^2}\)


answered Mar 17, 2013 by balaji.thirumalai
edited Jun 4, 2013 by poojasapani_1

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