Hypergeometric probability example George Polya in his excellent book posted a problem: ‘A dangerous disease treated in the same area by two different methods, which we will distinguish as the “old ...

Among 40 participants in a training, 8 were youths (less than 30 years), 25 were adults (30 to 59 years) and remaining 7 were senior citizens (60 or more years). 2 participants are selected at random ...

So, a friend of mine was bored one day and came up with this problem on his own (it related closely to some personal circumstances of his own). It intrigued me, but I have not been able to solve it.