<human>:  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?
<bot>: How many hours of television did Evelyn's family watch over the three weeks? ** Over the three weeks, they will have watched a total of 10 + 8 + 12 = <<10+8+12=30>>30 hours of television.
What is the average number of hours of television that Evelyn's family watches per week? ** The average number of hours per week is 30 hours / 3 = <<30/3=10>>10 hours of television.
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