There is a draw which takes place each month at the company i work for.

Each month; 2000 peoples names are put into a hat and 42 are drawn out at random. Once a name is drawn, it is not returned to the hat.

I have analysed the results of this draw over the past 9 months and so far 37 people have been drawn out on more then one occasion.

I would like to know the probability of this happening but my maths is very limited and i have not worked with probabilities since high school.

Any help would be greatfully received.

Thanks in advance.