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?................
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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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