Asked by finite

Assume that the student
has a cup with 13 writing implements: 7 pencils, 4 ball
point pens, and 2 felt-tip pens. In how many ways can the student select 9 writing implements if no more than one ball
point pen is selected?
Answered by bobpursley
1bp, 2felt, 6pencils
1bp, 1 felt,7 pencils
0bp, 2felt, 7 pencils

can you think of any others?
Answered by finite
it has to do with choosing, and combinations/permutations though.
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