Asked by diane
how many seven digit numbers can be formed with the digits 1,2,4,7 if NO repetition is allowed
Answers
Answered by
drwls
You or someone asked this question yesterday. See
http://www.jiskha.com/display.cgi?id=1224378615
"No repetition" means the same number seven digit does not appear more than once. It does not mean you cannot use the same digit twice; obviously you have to because you have to create a seven digit number with 4 digits.
http://www.jiskha.com/display.cgi?id=1224378615
"No repetition" means the same number seven digit does not appear more than once. It does not mean you cannot use the same digit twice; obviously you have to because you have to create a seven digit number with 4 digits.
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