Carol gets a fixed $20 allowance each week. She can also earn $1.5 more dollars each week if she does extra chores. At the end of 10 weeks, she has 425 dollars. How many extra chores did she average each week?
How much did Carol earn in total? ** She earned $42.5 on average per week because 425 / 10 = <<425/10=42.5>>42.5
How much did Carol earn from extra chores? ** She earned $22.5 each week from extra chores because 42.5 - 20 = <<42.5-20=22.5>>22.5
How many extra chores did Carol do each week? ** She did 15 extra chores a week because 22.5 / 1.5 = <<22.5/1.5=15>>15
#### 15