In case T, S and X are the only individuals serving on committee B, the total membership of committee C should be:
Nine individuals - Z, Y, X, W, V, U, T, Sand 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 B.
Among T, S and R none can serve on committee C.
