lower bound = 6

C(11,6,2) = 6

Method of Construction: lex covering

Lower Bound: Bounds for fixed number of blocks

  1  2  3  4  5  6
  1  7  8  9 10 11
  2  3  4  7  8  9
  2  3  4  5 10 11
  5  6  7  8  9 10
  1  2  3  4  6 11