Calculate weighted mean of the following data by using Direct and Short-cut Methods: {:("Items",81,76,74,58,70,73),("Weight",2,3,6,7,3,7):}

Calculate weighted mean of the following data by using Direct and Shor

1.	Calculate weighted mean of the following data by using Direct and Short-cut Methods: {:("Items",81,76,74,58,70,73),("Weight",2,3,6,7,3,7):}
Answer» ANSWER :WEIGHTED MEAN = 70.04