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How many 3-digit numbers can be formed f...

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?

Text Solution

Verified by Experts

The correct Answer is:
(i) 125 (ii) 60
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Knowledge Check

  • How many three-digit even numbers can be formed using the digits 1,2,3,4 and 5 when repetition of digits is not allowed?

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    36
    B
    30
    C
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    24
    D
    12

  • How many 5-digit prime numbers can be formed using the digits 1, 2, 3, 4, 5 if the repetition of digits is not allowed?

    A
    `5`
    B
    `4`
    C
    `3`
    D
    `0`

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