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.
closed as off-topic by heropup, user91500, астон вілла олоф мэллбэрг, Adriano, Behrouz Maleki Dec 18 '16 at 17:22
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