61.  That a, b and c are the odds.

62.  And why there are 3 groups of Q and 3 groups of a, b, c?

63.  We get a group of a, b, c (odds) with a group of P and a group of Q.

64.  That is to say, Q and a, b, c are dynamic, and as a result we will get a series of statistics.

65.  It must b a waste of money.