Draw this to make sure you don’t get messed up. Let’s use X for all the people in line who aren’t Bill and B for Bill.

X X X X B X X X X X X X X X X X

Above, Bill is the 5th person from the left and the 12th person from the right–that means there are 4 people to the left of him and 11 people to the right of him. 4 + 11 + 1 for Bill is 16 people in line, total.

from Tumblr https://ift.tt/2u7l5OL