Question 1157146: A jar contains 4 red marbles numbered 1 to 4 and 8 blue marbles numbered 1 to 8. A marble is drawn at random from the jar. Find the probability the marble is
a. Odd-numbered given that the marble is blue.
b. Blue given that the marble is odd-numbered.
Answer by Boreal(15235)   (Show Source):
You can put this solution on YOUR website! Given that the marble is blue (8) the probability it is odd is 4/8 (1/2), odd numbers 1,3,5,7
Given the marble is odd-numbered 1,3 R and the above B there are six possibilities, and 4 are blue, so the probability is (4/6) or 2/3.
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