Ribbons 6640
Danka knits a sweater and has a choice of seven colors.
a) How many ways can he choose three colors for the sleeves?
b) He wants ribbons of four colors on his back. How many options does he have to choose from?
a) How many ways can he choose three colors for the sleeves?
b) He wants ribbons of four colors on his back. How many options does he have to choose from?
Correct answer:
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