Help with probability please!

Question

I don't know how to use the information given to me to finish the problem. Jason, Erik, and Jamis are friends in art class. The teacher randomly chosen 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?

Answer 1

P(2 friends are chosen) = (3C2) / (21C2); you calculate numerator & denominator, and reduce the resulting fraction.

 

Grammatical correction: Teacher randomly CHOSE...