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The height (in cms) of 20 childre of cla...

The height (in cms) of 20 childre of class 9 is given, find the mean.
`{:("Height(in cm)","Number of children"),(" "120," "2),(" "121," "4),(" "122," "3),(" "123," "2),(" "124," "5),(" "125," "4):}`

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The correct Answer is:
122.8 cm
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