# Question: solve the following two quot union quot type questions a...

###### Question details

Solve the following two " union " type questions:

(a) How many bit strings of length 9 either begin with 3 0s or end
with 3 1s? (inclusive or)

(b) Every student in a discrete math class is either a computer science or a mathematics major or is a joint major in these two subjects. How many students are in the class if there are 3232 computer science majors (including joint majors), 2727 math majors (including joint majors) and 88 joint majors?