Question 902252
A) how many distinct groups of 3 students can be formed? 21C3
 B) find the probability that the selected group has exactly two graduate students.
P = {{{(6C2)(15C1)/(21C3)}}}
 C) find the probability that the selected group has at least one undergraduate student.
P = 1 - P(no UG) = 1 - {{{(6C3)(15C0)/(21C3)}}}