Dan’s Diner employs three dishwashers Dan’s Diner employs three dishwashers. Al washes 40% of dishes and breaks only 1%. Betty and Chuck each wash 30% with Betty breaking only 1% and Chuck breaking 3% of his. You go to Dan’s for supper and hear a dish break at the sink. What’s the probability that Chuck is on the job?

A private college report contains these stats: 70% of incoming Freshmen attended public schools. 75% of public school students who enroll as freshmen eventually graduate. 90% of other freshmen eventually graduate. What percent of freshmen eventually graduate? What percent of students who graduate from college attended a public high school?