Answer:
Step-by-step explanation:
Total number of marbles = 6 + 3 + 5 = 14
You want to draw out 3 marbles -- all of them red. In solving this, you have to assume that none are put back.
The answer is
P(Red) = 6/14 * 5/13 * 4/12
P(Red) = 3/7 + 5/13 + 1/3
numerator = 3*5*1 = 15
denominator = 7 * 13 * 3
denominator = 273
P(red) = 15 / 273
P(red) = 0.0549
