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In How Many Ways Can 4 Girls And 5 Boys Be Arranged In A Row So That All The Four Girls Are Together ? |
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Answer» Let 4 girls be ONE unit and now there are 6 units in all. They can be arranged in 6! ways. In each of these arrangements 4 girls can be arranged in 4! ways. Total NUMBER of arrangements in which girls are always TOGETHER = 6! X 4!= 720 x 24 = 17280. Let 4 girls be one unit and now there are 6 units in all. They can be arranged in 6! ways. In each of these arrangements 4 girls can be arranged in 4! ways. Total number of arrangements in which girls are always together = 6! x 4!= 720 x 24 = 17280. |
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