help please!!
The average of each of the 4 english term tests in mr smith's class was 70%, 64%, 74% and 68%. If the fourth term's average was weighted twice as much as for term one, find the average of Mr smith's class for the whole year

Question

help please!!
The average of each of the 4 english term tests in mr smith's class was 70%, 64%, 74% and 68%. If the fourth term's average was weighted twice as much as for term one, find the average of Mr smith's class for the whole year

mathmale · Answer

Here's what comes to mind:

Let the weightings be 1, 1, 1 and 2, in that order.

           1*70% + 1*64%+1*74% + 2*68%
Find:  -----------------------------
                                   4

Can anyone suggest a better approach?