Question: among 15 clocks there are two deffectives . in how many ways can inspector chose three of clocks for inspection that; a, there is no

among 15 clocks there are two deffectives . in how many ways can inspector chose three of clocks for inspection that;

a, there is no restricton

b, none of deffective clock is included

c, only one of deffecyive clock is included

  • d, two of the deffecyive clock is included

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