From the following grouped data, find the mean. Please round your answer to the nearest tenth.
IntervalMidpointxFrequencyfProductxf42.5 - 47.5 12 47.5 - 52.5 15 52.5 - 57.5 20 57.5 - 62.5 25 62.5 - 67.5 4 67.5 - 72.5 2
A. mean = 54.5
B. mean = 54.3
C. mean = 57.1
D. mean = 53.5
E. mean = 55.0
Answer: E
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