in how many way can 12 books be arranged on a shelf if
a) 4 particular books must always be together.
b) 2 particular books must occupy the first position and the last position
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Answer:
4 particular books must always be together. Total number of Ways = 9! * 4! (b) 2 particular books must occupy the first position and the last position.
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Answer:
A) 4 particular books must always be together.
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