a box contains 5 red marbles 7 blue marbles and 8 white marbles what is the probability of taking out a round number
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Answer:
Since we only care about red marbles, we can rephrase the question to be “24 marbles are in a bag, 5 of which are red. If you draw three, what are the chances exactly two are red.”
Since the question specifies exactly, it makes it a little easier.
If we drew two marbes, the chances would be 5/24 * 4/23 * 17/22
How did I get those numbers? Well, since we are considering the system as a whole, we want to compute the highest odds we can have. Assuming we drew a red marble on d1, there are only 4 left out of 23. Assuming that was a good marble, there are now 17 left.
So 2.8% is my answer.
Step-by-step explanation:
Hope it helps