Asked by Audrey

Keshawn and Samantha are in a science class with 18 other students. The teacher randomly divides the class into 10 pairs of laboratory partners. Whar is the probability that Keshawn and Samantha are lab partners?
Answered by drwls
Keshawn has 19 other potential partners with equal probablility of each. (That is because there is a total of 20 students). What does that tell you?
Answered by Audrey
he has a probability of 1:19?
Answered by Audrey
is 1:19 the correct answer? Because, the more I think about it, the more confused I get since there are 20 students in the class, but it has to be 19, since Keshawn can't be partnered with himself, right?