Betsy is making a flag. She can choose three colors from red, white, blue and yellow. How many choices does Betsy have?
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The number of choosing 3 colors out of 4 available colors =
⁴C₃ = 4! / (3! * 1! ) = 4
the choices will be : RWB , WBY, RWY, BYR
⁴C₃ = 4! / (3! * 1! ) = 4
the choices will be : RWB , WBY, RWY, BYR
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