Find the value of 'f' if arthimetic mean of the following data is 35 ; X = 10 , 20 ,30 , 40 , 50 , 60 , : Frequency = 4 , 6 , 9 , f , 7 , 3
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The surroundings and I have no doubt of the plasma of my own and my love of life in a thin and healthy life
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