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How do you work this out?

Ben had a mean mark of 82% for three exams.

If he scored 75% and 91% for two of the exams, what was his mark on the third exam?
Rokasu · 36-40, M
I don’t understand why people are so confused by math. The answer is obviously yellow.
SW-User
What are you talking about, you eedgiot. 😒 Don’t confuse her, it’s obviously not yellow. It’s pink. @Rokasu
Rokasu · 36-40, M
@SW-User
1. Turqoise + 82 / mass of the moon + 91 + Integral of cheese.
2. Carry the Chinese take out.
3. Add in some sugar
4. *Professor level skipped work*
5. Pink

Well shit me a brick.
SW-User
@Rokasu I’m never wrong 😌
ButterRobot · 51-55, M
(75+91+x)/3=82
ButterRobot · 51-55, M
if you solve for x, then x=80.
SW-User
Rob04 · 18-21, M
@ButterRobot Thanks! Thought I was clever in my class but haven't come across this yet. It Algebra I know. Need t remember formula.
room101 · 51-55, M
3x82=246

246-(75+91)=80

the answer is 80%
MartinTheFirst · 22-25, M
@room101 that's a good way to do it
Miram · 31-35, F
75+91+X/3= 82%
166+X = 82*3
x= 246-166= 80%
Miram · 31-35, F
Why do you ask these questions frequently? Are they your own tests?
summerlove · 31-35, F
@Miram I don't ask them frequently and they're practice tests and just like when people explain it on here, it really helps with understanding it as I'm trying to improve on it.
Miram · 31-35, F
@summerlove That's good.
SW-User
somewhere in between
SW-User
SW-User
MartinTheFirst · 22-25, M
75+77+91/3=182,3333333
MartinTheFirst · 22-25, M
@SW-User im tired okay -_- I thought right, but i entered the numbers wrong lol, swap out 77 with 80 and 192,333 with 82
SW-User
@MartinTheFirst 😂, you didn’t just put them in wrong. You put them in exceptionally wrong.
MartinTheFirst · 22-25, M
@SW-User 🙄🙄🙄
MartinTheFirst · 22-25, M
trial and error.

 
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