March 29, 2017

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An urn contains six red balls and five white balls. A sample of 2 balls is selected at random from the urn. What is the probability that at least one of the balls is red?

  • Finite Math - ,

    This is the probability of one red ball or two red balls.

    One = 6/11 * 5/10 = ?

    Two = 6/11 * 5/10 = ?

    Either-or probability is found by adding the individual probabilities.

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