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Find the 3-digit numbers that can be formed from the given digits: 1, 2, 3, 4 and 5 assuming that a) digits can be repeated. b) digits are not allowed to be repeated

Find the 3-digit numbers that can be formed from the given digits: 1, 2, 3, 4 and 5 assuming that

a) digits can be repeated.

b) digits are not allowed to be repeated

Grade:12

1 Answers

Harshit Singh
askIITians Faculty 5964 Points
10 months ago
Welcome to AskIITians

a)By the multiplication principle, the number of ways in which three-digit numbers can be formed from the given digits is 5 × 5 × 5 = 125

b)By the multiplication principle, the number of ways in which three-digit numbers can be formed without repeating the given digits is 5 × 4 × 3 = 60

Thanks

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