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Mathematics, 02.07.2021 15:20 zeesharpe05
We have 9 pens, of which 5 are green ink, 3 are red ink, and 1 is black. If we put the pens in a line, how many arrangements are possible
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We have 9 pens, of which 5 are green ink, 3 are red ink, and 1 is black. If we put the pens in a lin...
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