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| 1. |
How many 3-digit numbers can be formed from the digits 1, 2, 3, 4 and 5 assuming that1. repetition of the digits is allowed?2. repetition of the digits is not allowed |
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Answer» 1.
Hence by fundamental principle of counting there are 5 × 5 × 5 = 125 different 3 digit numbers. 2.
Hence by fundamental principle of counting there are 5 × 4 × 3 = 60 different 3 digit numbers. |
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