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A shelf contains 25 different books, 7 are in single volume and other are in set of 9, 6, 3 volumes respectively. Total number of ways in which books may be arranged on the shelf if volumes of each set are together and in increasing or decreasing order. |
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Answer» ong>Given : A shelf CONTAINS 25 different books, 7 are in single volume and other are in set of 9, 6, 3 volumes respectively. To Find : Total number of ways in which books may be arranged on the shelf if volumes of each set are together and in increasing or DECREASING order. Solution: there are 7 in single volume and other are in set of 9, 6, 3 volumes Hence 7 + 3 volumes = 10 10 can be arranged in 10! Ways Each volume can be arranged in 2 ways increasing or decreasing order. hence 2 * 2 * 2 = 8 ways Total Ways of in which books may be arranged on the shelf = 8 * 10! =2,90,30,400 8 * 10! Learn More: Given 8 different physics books,7 different chemistry books and 5 ... In how MANY ways can 12 books be arranged on a shelf if: (a) 4 ... In how many ways can 20 notes of 500 rupees and 18 notes of 2000 ... |
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