March 28, 2017

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A box contains 3 white and 5 black balls. Four balls are drawn at random
"with replacement" from the box (i.e. selected balls are returned to the
box and mixed, before drawing the next ball). Let X be the number of
black balls drawn. What is the distribution of X? What is the probability
that 3 or more black balls are drawn?

  • statistics - ,


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