10 times, because its gonna be spun 40 times, and there's 4 options, so 40 divided by 4 OR you can do it the long way (What I basically did) and count around 40 times, each time landing on B you write that down or do whatever to keep track.
Answer:
140 - 9 (12) + 3
140 - 108 +3
140 - 111
= 29