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Write all the possible 2-digt numbers us...

Write all the possible 2-digt numbers using the digits 3, 4 and 5 without repeating any digit.

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The correct Answer is:
six
We are given 3 digits.
We can make three 2-digit combinations.
`{:("Digits", 3","4, 4","5, 5","3),(, 34, 45, 53),(, 43, 54, 35):}`
`therefore " There exist six 2-digit numbers."`
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