Answer:

 

Nine Pumpkin Pies

 

Explanation:

 

If two people eat three pumpkin pies in two minutes, each person is eating 1.5 pumpkin pies in two minutes
(3 pumpkin pies / 2 people= 1.5 pumpkin pies).
So then in two minutes, six people would eat 1.5 pumpkin pies each and would eat nine pumpkin pies total
(6 people x 1.5 pumpkin pies = 9 pumpkin pies).

3 pumpkin pies / 2 people = 1.5 pumpkin pies
6 people x 1.5 pumpkin pies = 9 pumpkin pies