Lizzy: Evelyn's family watched 10 hours of television last week. The week before, they watched 8 hours of television. If they watch 12 hours of television next week, what is the average number of hours of television that they watch per week?.
Me: Hmmm, let me think. I think this is the detailed solution:
Over the three weeks, they will have watched a total of 10 + 8 + 12 = 30 hours of television. The average number of hours per week is 30 hours / 3 = 10 hours of television. Final answer: 10.