Question 816673
the formula is:
.85 * 63% + .15 * x = 63%
solve for x to get:
x = (63% - .85*63%) / .15 which results in:
x = 63%


if you want to raise your score to 65%, then the formula would be:
.85 * 63% + .15 * x = 65%
solve for x to get:
x = (65% - .85 * 63%) / .15 which results in:
x = 76.333333333%



the best you can do is if you get 100% on the final.
then your overall average would be:
.85 * 63% + .15 * 100% = 68.55%