A jar contains 9 red marbles numbered 1 to 9 and 7 blue marbles numbered 1 to 7. A marble is drawn at random from the jar. Find the probability that the marble is blue or even-numbered.

Question

I had 1/7

Answer 1

P(Blue) = 7/16

P(Even) = 7/16

Either-or probabilities are found by adding the individual probabilities.