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algebra 2/help

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7) A theater is staging a series of 10 different plays.You want to attend at least 2 of the plays.How many different combinations of plays can you attend?

  • algebra 2/help - ,

    10C2 = 10!/((10-2)!2!)
    x!=factorial x=x(x-1)(x-2)....(2)(1)

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