y P(y)
0 0.1
1 0.2
2 0.32
3 0.13
4 0.1
5 0.06
6 0.05
7 0.04
The demand of a certain book in a bookstore on any given day is given by the above mentioned table.
a. On 5 randomly chosen days, what is the probability that 3 of the 5 days have demand more than 4.