Nine individuals - Z, Y, X, W, V, U, T, S and R - are the only candidates, who can serve on three committees-- A,
B and C, and each candidate should serve on exactly one of the committees.
- Committee A should consist of exactly one member more than committee B.
- It is possible that there are no members of committee C.
- Among Z, Y and X none can serve on committee A.
- Among W, V and U none can serve on committee G.
- Among T, S and R none can serve on committee C.