Abia is one of three servers who work at a restaurant that is open from Tuesday to Sunday. Every week the servers randomly draw slips of paper from a hat to decide which two days they will not have to work, in addition to Monday.

One week Abia gets to draw her two days first.
a) What is the conditional probability that Abia will draw a second weekend day, given that her first draw was a weekend day?
b) What is the probability that Abia will get to enjoy a three-day weekend (Saturday to Monday)?

1 answer

a) 1/5

b) 1/6 + 1/5 = ?