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Permutations and combinations

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Intern
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Joined: 03 Oct 2016
Posts: 2
Permutations and combinations  [#permalink]

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New post 03 Nov 2018, 07:14
1
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A
B
C
D
E

Difficulty:

  55% (hard)

Question Stats:

40% (02:14) correct 60% (02:41) wrong based on 5 sessions

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Permutations.

Each of the digits 7, 5, 8, 9, and 4 is used only once to form a three-digit integer and a two-digit integer. If the sum of the integers is 555, how many such pairs of integers can be formed?

A: One
B: Two
C: Three
D: Four
E: Five
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Joined: 02 Sep 2009
Posts: 59632
Re: Permutations and combinations  [#permalink]

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New post 03 Nov 2018, 07:16
sanogee wrote:
Permutations.

Each of the digits 7, 5, 8, 9, and 4 is used only once to form a three-digit integer and a two-digit integer. If the sum of the integers is 555, how many such pairs of integers can be formed?

A: One
B: Two
C: Three
D: Four
E: Five


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Re: Permutations and combinations   [#permalink] 03 Nov 2018, 07:16
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Permutations and combinations

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