7 points are marked on a straight line and another 8 points are marked on a second straight line with no points in common. How many triangles can be constructed with vertices from among the above points?	Choose one
A) 21  B) 91  C) 168  D) 196  E) 364
select 2 points from one line and one from another.   7C2 * 8C1 [ 2 points from the line containing 7 points and 1 from the line containing 8 points]   +   8C2 * 7C1 [ 2 points from the line containing 8 points and 1 from the line containing 7 points]   =364   ANSW364R: [364]
<result>E</result>
7 points are marked on a straight line and another 8 points are marked on a second straight line with no points in common. How many triangles can be constructed with vertices from among the above points?