A bag contains 3 green marbles, 4 red marbles, and 5 blue marbles. Three marbles are drawn from the bag without replacement. Find the probability of drawing 2 red marbles and 1 blue marble.
Added by David H.
Step 1
This can be calculated using combinations, which is denoted as C(n, k) or "n choose k". In this case, we have a total of 12 marbles (3 green, 4 red, and 5 blue), so n = 12, and we want to choose 3 marbles, so k = 3. The formula for combinations is: C(n, k) = n! / Show more…
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