The average rainfall for the four months is 3 27/40 inches
The rainfall amounts are given as:
June 2 1/2 inches, July 3 1/4 inches, August 4 1/5 and September 4 3/4 inches.
The average rainfall for the four months is calculated as:
Average = Sum of rainfall/Number of months
So, we have
Average = (2 1/2 + 3 1/4 + 4 1/5 + 4 3/4)/4
Evaluate the sum
Average = (14 7/10)/4
Evaluate the quotient
Average = 3 27/40
Hence, the average rainfall for the four months is 3 27/40 inches
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