A bag contains 5 red marbles, 4 blue marbles and 6 green marbles. If three marbles

are drawn out of the bag, what is the exact probability that all three marbles drawn

will be red?

The probability of drawing three red marbles is 1/27, or about 3.71%

Step-by-step explanation:

Add all the marbles:

5 + 4 + 6 = 15

Find favourable outcomes:

5

The probability for drawing a red marble is:

5/15 or 1/3

Multiply this * 3 to find the probability of drawing three red marbles.

1/3 * 1/3 * 1/3 = 1/27

1 : 27 = 0.0370370370 ... repeating