what if you have an B 86% in a class and you fail your final exam that is 15 % of your grade, then what percentage would you have after your final exam? alright, let me revise, if i have a B 86 % in a class and i fail the final exam that is 15% of my grade, then much of my grade would be lowered?................
The answer depends on the margin of how badly you failed your final exam. Here is the equation to calculate your final average, if x=exam grade:
.15x + 86 (.85) = Final overall average.
So if you made a 68 on the final exam, multiply the 68 times fifteen percent, or .15. The resulting number is 10.2. You would then add the 10.2 to 86 times 85%:
.15 (68) + 86 (.85) =
10.2 + 73.10 = 83. 3, your Final Overall average
The good news is that even if you made a 0 on your final exam, your average would still be above a 70. Your average of 86% is worth 85% of your final average, so even with a zero on the final, your average would be 73%.
You would need to score at least a 47 on the final exam to maintain your B average for the final grade.
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