LASS 11 MATHS CHAPTER-7 PERMUTATION AND COMBINATION

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Exercise 7.1 Question1. How many 3-digit numbers can be formed from the digits 1, 2, 3, 4 and 5 assuming that: (i) repetition of the digits is allowed (ii) repetition of the digits is not allowed. Solution :(i) The unit place can be filled by any one of the digits 1, 2, 3, 4 and …

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