In a box, there are 5 black pens, 3 white pens and 4 red pens. In how many ways can 2 black pens, 2 white pens and 2 red pens be chosen?
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Step-by-step explanation:
There are total 5+4+3=12 pens
Ways for 2 black pen= 2÷12= 1÷6
ways for 2 white pen= 2÷12 =1÷ 6
ways for 2 red pens = 2÷12= 1÷ 6
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Step-by-step explanation:
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