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In a retail market, fruit vendors were selling mangoes kept in packing boxes. These boxes contained varying number of mangoes. The following was the distribution of mangoes according to the number of boxes.
 
Number of mangoes 50-52 53-55 56-58 59-61 62-64
Number of boxes 15 110 135 115 25
 
Find the mean number of mangoes kept in a packing box. Which method of finding
the mean did you choose?
 
Mean =