He would spend $, he spent $320 for just renting the limousine then spent an extra $32 for the 10% tip
Since you are given that the student registered early, the total number you deal with is all students who registered early.
211 + 329 = 540
number of undergraduates who registered early = 211
Among students who registered early:
p(undergraduate) = 211/540
If you’re cutting it into half inch pieces, you’ll take the length of the roll and multiply it by 2, so 13•2=26