IKMC 2011 - Grades 3-4 - Self-study Question 7

A tower clock strikes on the hour (8:00, 9:00, 10:00 and so on) as many times as the hour. It also strikes once at half past each hour (8:30, 9:30, 10:30 and so on). How many times did it strike from 7:55 to 10:45?