You are given a math word problem and you are supposed to make use of mathematical concepts like probability, combinatorics, linear equations, sequences/series, or simple operators like addition, subtraction, division, or multiplication to answer the given question. Choose the best option from the 5 given options and report that option.

[Q]: Question: Anthony and Michael sit on the six member board of directors for company X. If the board is to be split up into 2 three-person subcommittees, what percent R of all the possible subcommittees that include Michael also include Anthony?

 Option A:  20%

 Option B:  30%

 Option C:  40%

 Option D:  50%

 Option E:  60%
[A]: Option C


[Q]: Question: Look at this series: 8, 43, 11, 41, __, 39, 17, ... What number should fill in the blank?

 Option A: 22

 Option B: 33

 Option C: 14

 Option D: 16

 Option E: 18
[A]: Option C


[Q]: Question: A and B can do a piece of work in 10 days, B and C in 15 days, C and A in 12 days. How long will C take to do it?

 Option A: 70 days

 Option B: 55 days

 Option C: 24 days

 Option D: 40 days

 Option E: 11 days
[A]:
Option D