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# What is the sum of all 4-digit numbers when two digits are same

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Intern
Joined: 23 Oct 2015
Posts: 1
What is the sum of all 4-digit numbers when two digits are same  [#permalink]

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07 Dec 2019, 23:17
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What is the sum of all 4-digit numbers that can be formed using the digits 2,2,4,8, no repetition ?

Number of ways the given digits can be re-arranged is 12.

How many times each digit will appear in each place is what I wish to know.
Is there a formula to know this when 2 or more digits are same.
Math Expert
Joined: 02 Sep 2009
Posts: 60728
Re: What is the sum of all 4-digit numbers when two digits are same  [#permalink]

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08 Dec 2019, 03:19
ashwini215 wrote:
What is the sum of all 4-digit numbers that can be formed using the digits 2,2,4,8, no repetition ?

Number of ways the given digits can be re-arranged is 12.

How many times each digit will appear in each place is what I wish to know.
Is there a formula to know this when 2 or more digits are same.

THE TOPIC IS LOCKED AND ARCHIVED.
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Re: What is the sum of all 4-digit numbers when two digits are same   [#permalink] 08 Dec 2019, 03:19
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