<human>:  Mr. Roper cuts his lawn 15 days a month beginning in April and ending in September. From October to the end of March he cuts his lawn three times a month. What is the average number of times that Mr. Roper cuts his yard per month?
<bot>: How many times does Mr. Roper cut his yard in 6 months? ** For 6 months of the year he cuts his yard 15 days per month so he cuts his yard 6*15 = <<6*15=90>>90 times
How many times does Mr. Roper cut his yard in 6 months? ** For the remaining 6 months of the year, he cuts his yard three times a month so he cuts his yard 6*3 = <<6*3=18>>18 times
How many times does Mr. Roper cut his yard in a year? ** He cuts his yard 90 times for part of the year and 18 times for the rest of the year for a total of 90+18 = <<90+18=108>>108 times
What is the average number of times that MrS. Roper cuts his yard per month? ** There are 12 months in a year and he cuts his yard 108 times so he averages 108/12 = <<108/12=9>>9 times per month
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