9. In how many ways can 4 men and 3 women arrange themselves in a row for picture taking if the men and women must stand in alternate positions? A. 5 040 B. 720 C. 144 D. 30
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There are m ways to arrange the men and w ways to arrange the women, where m is the number of men and w is the number of women. In this case, we have 3 women, so w = 3. Show more…
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