A box contains 7 yellow, 5 blue, and 4 red balls. Three balls are drawn at random. Find the probability that:
1 answer:
Answer: 27/80
Step-by-step explanation:
Your dealing with probability this time, not multiplying chooses. So it's adding instead of multiplying.
Total balls, 16
All options: 16 choose 3,
Blue
7 choose 2 * 5 choose 1 / 16 choose 3 = option1
Red
7 choose 2 * 5 choose 1 / 16 choose 3 = option2
Add option1 + 2
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