In a group of 100 people; 25 were playing cricket and 23 were playing football. Find the probability that a student picked from this group at random is either playing cricket or football?

In a group of 100 people; 25 were regular apple eaters and 35 did not like apples. Find the probability that a people picked from this group at random is either a regular apple eater or did not like apples?

In a group of 72 girls; 18 are married and 41 are unmarried. Find the probability that a girl picked from this group at random is married?

In a group of 45 boys; 17 own a laptop, 19 own a desktop computers, and 7 own both. Find the probability that a boy picked from this group at random owns either a laptop or a desktop computer.