1. In how many ways can we select 4 people from a group of 9 people and award them first through fourth prizes? 2. Calculate the number of permutations of 10 items taken 4 at a time. N = 3. Calculate the number of combinations of 12 items taken 8 at a time.
Added by Christine J.
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Step 2: Calculate the number of permutations: \(P(9,4) = \frac{9!}{(9-4)!} = \frac{9!}{5!} = 9 \times 8 \times 7 \times 6 = 3024\). Step 3: The number of permutations of 10 items taken 4 at a time is 5040. Step 4: The number of combinations of 12 items taken 8 at Show more…
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