Answer to Question #199874 in Statistics and Probability for Abby Pham

Question #199874

A jar contains 8 red marbles, numbered 1 to 8, and 12 blue marbles numbered 1 to 12.


a) A marble is chosen at random. If you're told the marble is blue, what is the probability that it has the number 6 on it?

   


b) The first marble is replaced, and another marble is chosen at random. If you're told the marble has the number 1 on it, what is the probability the marble is blue?


1
Expert's answer
2021-05-31T01:32:25-0400

a)


P(6Blue)=112P(6|Blue)=\dfrac{1}{12}

b)


P(Blue1)=12P(Blue|1)=\dfrac{1}{2}


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