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26-12-2017
Mathematics

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How many three-digit even numbers can be formed using digits from the set {1, 2, 3, 4, 5, 6, 7}
a. if no digit can be repeated in any one number?

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26-12-2017

The unit numbers can be 2,4,6.Suppose 2 as the unit number we can form 20 numbers the same way for 4 and 6 so totally 60 numbers.

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