4. How many 6-digit numbers (using 1,2,3, ... ,9) are there if repetition is not allowed? How many are there which have at least one digit repeated?
4. How many 6-digit numbers (using 1,2,3, ... ,9) are there if repetition is not allowed? How many are there which have at least one digit repeated?
Chapter9: Sequences, Probability And Counting Theory
Section: Chapter Questions
Problem 34RE: A palette of water color paints has 3 shades of green, 3 shades of blue, 2 shades of red, 2 shades...
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How can we solve questions 4, 6, and 8 ? Using repetition, subsets, and coefficients?
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