12. If P(n, r) = 120, which of the following are possible values of n and r? A. n = 6, r = 4 B. n = 7, r = 3 C. n = 6, r = 2 D. n = 7, r = 4 13. In how many ways can Jenny choose three flavors from six flavors of milk tea? A. 20 B. 12 C. 10 D. 120
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P(n, r) represents the number of permutations of n objects taken r at a time. So, we need to find values of n and r that satisfy this equation. Show more…
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