SOLUTION: How many different pair of numbers can be formed from the digits 1.2.3.10.20.30.)

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Question 497419: How many different pair of numbers can be formed from the digits 1.2.3.10.20.30.)
Answer by richard1234(7193) About Me  (Show Source):
You can put this solution on YOUR website!
10, 20, and 30 are not digits (in base 10). You'll have to clarify your question.