how many ways to select a subset of eight dougnuts from three types of donuts if at most two doughnuts of the first type can be chosen

Identify the converse of the following conditional: if a point is in the first quadrant, then its coordinates are positive. if the coordinates of a point are not positive, then the point is not in the first quadrant. if the coordinates of a point are positive, then the point is in the first quadrant. if a point is in the first quadrant, then its coordinates are positive. if a point is not in the first quadrant, then the coordinates of the point are not positive.

How do you use the elimination method for this question? explain, because i really want to understand!

Which is greater, 7 p 5 or 7 c 5? 7p5 7c5