Question 878527
Your test = {{{1/5}}}
Everything else = {{{4/5}}}
{{{4/5}}} of your grade is 94.  Multiply 94 * 4, 376
If you get 55 on the test, your grade is 376 + 55, or 431 out of 500
431/500 = 86.2
.
Shame to throw away the A.  Ask for some extra credit.  You only need a 69 to have a 90 average.