<PRE><B>Question 851030</B>
i got a 69 on term 1. a 63 in term 2. but now my question is what do i need to get in term 3 to get a total average of 75%. Both term 1 and 2 count for 20% each while term 3 60%. wht will my term 3 mark need to be?
:
The 3rd term counts three times as each of the first two, therefore treat it as 3 tests for a total of 5 tests
Let t = 3rd term grade required to get a 75 av
:
{{{((69 + 63 + 3t))/5}}} = 75
132 + 3t = 75 * 5
3t = 375 - 132
t = 243/3
t = 81
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