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How many distinct combinations can be formed, taken 3 at a time, from the following 10 digits: 1, 1, 2, 2, 3, 3, 4, 4, 5, 5. Thank you.

 Jan 28, 2020
 #1
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i dunno

 Jan 28, 2020
 #2
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A short computer code, in Python, gives the following 30 distinct combinations.


(112, 113, 114, 115, 122, 123, 124, 125, 133, 134, 135, 144, 145, 155, 223, 224, 225, 233, 234, 235, 244, 245, 255, 334, 335, 344, 345, 355, 445, 455)>>Total =30

 Jan 29, 2020

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