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How many ways can an adviser choose 4 students from a class of 12 if they are all assigned the same tasks
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12C4= 12*11*10*9/(47*3*2*1) = 495 ways.
12C4= 12*11*10*9/(47*3*2*1) = 495 ways.
12C4= 12*11*10*9/(47*3*2*1) = 495 ways.
12C4= 12*11*10*9/(47*3*2*1) = 495 ways.
12C4= 12*11*10*9/(47*3*2*1) = 495 ways.