Number of possible pairs chosen
= C(21,2) = 210
number of ways to choose 2 of the 3 friends = C(3,2) = 3
prob(of stated event) = 3/210 = 1/70
Jason, Erik, and Jamie are friends in art class. The teacher randomly chooses 2 of the 21 students in the class to work together on a project. What is the probability that two of these three friends will be chosen?
A. 1/105 B. 1/70 C. 4/50 D. 34/140
2 answers
sabe