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24-02-2021
Mathematics

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Ten cards numbered 1 through 10 are mixed together and then one card is drawn. What is the
probability of selecting a 2 or 3?

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mchs37993 mchs37993

24-02-2021

Chance of a 2: 1/10. Chance of a 3: 1/10. These are disjoint events (they can’t happen at the same time) but we need the probability that either can happen. So 1/10+1/10=2/10=1/5.
This intuitively makes sense since there are 2 numbers out 10

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