Question 401885
A debate team of 4 is to be chosen from a class of 35. There are two twin brothers in the class. How many possible ways can the team be formed which will include only one of the twin brothers?
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There are 2 twin boys to choose 1 from and 33 non-twins to choose 3 from.

So we can choose the one twin 2C1 ways and the three non-twins 33C3 ways,
so that's

(2C1)(33C3) = (2)(5456) = 10912 ways.

Edwin</pre>