Question

A student obtained the following marks percentage in an examination English - 50, Accounts - 75, Economics - 60, B. Std. - 80 Hindi - 55 If weights are 2, 3, 3, 2, 1 respectively allotted to the subjects his weighted mean is

• A. $\frac{50+75+60+80+55}{2+3+3+2+1}$
• B. $\frac{(50\times 2)+(75\times 3)+(60\times 3)+(80\times 2)+(55\times 1)}{5}$
• C. $\frac{50\times 2+75\times 3+60\times 3+80\times 2+55\times 1}{2+3+3+2+1}$
• D. none

Answer 1

The correct option is C $\frac{50\times 2+75\times 3+60\times 3+80\times 2+55\times 1}{2+3+3+2+1}$

Given A student obtained the following marks percentage in an examination English - 50, Accounts - 75, Economics - 60, B. Std. - 80 Hindi - 55 If weights are 2, 3, 3, 2, 1 respectively allotted to the subjects

Then total number in English =$50\times 2$

And total number in accounts =$75\times 3$

And total number in Economic =$60\times 3$

And total number in B.Std =$80\times 2$

And total number in Hindi =$55\times 1$

Then Weight mean =$\frac{50\times 2+75\times 3+60\times 3+80\times 2+55\times 1}{2+3+3+2+1}$