A certain univercity will celect 1 of 7 candidates eligible to fill a position in the mathematics department and 2 of 10 candidates eligible to fil 2 identical positions in the computer science department. If none of the candidates is eligible for a position in both departments, how many different sets of 3 candidates are there to fill the 3 position?
a42
b70
c 140
d 165
e315 | 
