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| Non-conformist choice (Posted on 2024-03-14) |
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There are total 21 balls in a bag.
Out of them 7 are blue,
5 are green
and 9 are black.
You pick 4 balls randomly from the bag.
What is the probability that not all balls are of the same colour?
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Submitted by Ady TZIDON
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Solution:
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(Hide)
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ANSWER: 97.2264 is accurate enough
See Charlie reasoning, extra digits are misleading. |
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