In: Statistics and Probability
what is the probability?
A jar contains 4 red marbles, numbered 1 to 4, 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 2 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?