A bowling alley makes a collection of bowling balls available to the public. The weights (in pounds) are listed below. If a bowler selects a ball at random, find the probability that its weight is between 10 to 12 pounds, inclusive.

14 9 16 8 11 13 15 13 6
13 12 14 16 7 6 8 9 16
16 7 14 16 6 16 11 8 9
8 7 8 14 16 11 14 15 10