Calculate weighted mean of the following data: {:("Marks(X)",81,76,74,58,70,73),("Weight(W)",2,3,6,7,3,7):}

Calculate weighted mean of the following data: {:("Marks(X)",81,76,74

1.	Calculate weighted mean of the following data: {:("Marks(X)",81,76,74,58,70,73),("Weight(W)",2,3,6,7,3,7):}
Answer» SOLUTION : WEIGHTED MEAN, `barX_(W)=(sumWX)/(sumW)=(1,961)/28=70.04` Weighted Mean = 70.04 markds.