#### Answer

a) 5850
b) 343

#### Work Step by Step

mathematics majors = 18 computer science majors = 325
a.) For the first representative, we have 18 choices and for the second representative, there are 325 choices. So, total ways = 18 x 325 = 5850
b.) We can choose either of the majors. So, total ways = 18 + 325 = 343