20. If $C(10,r) = 120$, what is the possible value of $r$? A. 2 B. 5 C. 7 D. 10 21. A gift wrapping station offers 4 kinds of boxes, 8 wrapper designs and 7 ribbon colors. In how many ways can a gift be wrapped? A. 19 B. 224 C. 969 D. 4 877 107 200
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The given information is "C(of)-120". It is not clear what "C(of)" represents, so we cannot determine the value of D I0 based on this information alone. Show more…
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