16. In how many ways can a committee of 7 students be chosen from 9 juniors and 9 seniors if there must be 4 seniors in the committee? A. 10 584 B. 1764 C. 210 D. 84 Jane wants to solve a system of equations through elimination by combining any two equations. The number
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This can be done in $\binom{9}{4} = 126$ ways. Show more…
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