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A survey was conducted by a group of stu...

A survey was conducted by a group of students as a part of their environment awareness programme, in which they collected the following data regarding the number of plants in 20 houses in a locality . Find the mean number of plants per house.
`{:("Number of plants ",0-2,2-4,4-6,6-8,8-10,10-12,12-14),("Number of houses "," "1," "2," "1," "5," "6," "2," "3):}`
Which method did you use for finding the mean, and why ?

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The correct Answer is:
8 . 1 plants
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