Respuesta :
Provided that no one can receive more than one prize, there are 50*49*48= 117600 ways to distribute the prizes. The first prize can be given to any of the 50 people, the second to any of the remaining 49, and the third to the remaining of the 48, multiplying these possibilities together leads to the answer.
I could get do the combination of 50 as the Object and 3 as the sample to get 19600 as the answer. took the test and it was right.