18 high resolution photos
36 low resolution photos
450 g in 2:13
<u>Total proportion asked for </u>=2+13=15
<u>Now comparing g with ratio, or whatever </u>
450/15=30g
Therefore 1 in ratio depicts of 30g
So final answer = 

More to know, daily bit of knowledge: The Binomial Theorem:

My guess is he gets heads about half the time
Answer:
perhaps 60%?
Step-by-step explanation: