Of the last 60 people who went to the cash register at a department store, 11 had blond hair, 19 had black hair, 24 had brown hair, and 6 had red hair. Determine the empirical probability that the next person to come to the cash register has red hair.

White shapes and black shapes are used in a game. some of the shapes are circles. while the rest are squares. the ratio of the number of white shapes to the number of black shapes is 5: 11. the ratio of the number of white cicrles to the number of white squares is 3: 7. the ratio of the number of black circles to the number of black squres is 3: 8. work out what fraction of all the shapes are circles.