Answer:
A graph of the probability distribution is attached.
Explanation:
The probability that a student gets first place is 1/50. The probability that a student gets second place is 1/50. The probability that a student gets third place is 1/50. The probability that a student gets fourth pace is 10/50. This leaves
50-(1+1+1+10) = 50-13 = 37
students that do not place.