# Random Stuff

Discrete Mathematics Level pending

Comfi Cabs always has five taxis working at the same time.
Each working taxi is either available or not available.
At any time, the probability that a taxi is not available is 0.4.
Find the probability that exactly two of the five taxis are available at the same time.
You should use part of this equation

$(p + q)^5 = p^5+ 5p^4q + 10p^3q^2+ 10p^2q^3+ 5pq^4+ q^5$