1.

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):}`

Answer» Correct Answer - 122.8 cm


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