What is the overall order of reaction for the elementary system A+2B=products?

Question

a)0
b)1
c)2
d)3
e)5

Can somebody explain this question to me. I don't get it.

Answer 1

This isn't quite the same as the order of a rate equation. Here is a site that may help you get started.
http://www.science.uwaterloo.ca/~cchieh/cact/c123/elmntary.html