1. The refrigerators in seven households need repair, and each owner calls the town handyman on a randomly chosen day of the week. What is the prob- ability that the handyman gets at least one day of the week off?
2. A fair die is rolled thrice. What is the probability that the sum is at least nine but at most 15?
3. What is the probability that North receives an odd number of spades in his hand in a bridge game? Count zero as even.
4. (Bad Luck). Jeff and Donna have three children. Two are chosen at random on each day of the week to help with the dishes. What is the probability that at least one child gets chosen every day of the week?