SOLUTION: If 45% of the students in a course made an A; 35% made a B; and the remaining 12 students made a C, how many students in the course made an A?

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Question 524681: If 45% of the students in a course made an A; 35% made a B; and the remaining 12 students made a C, how many students in the course made an A?
Found 3 solutions by solver91311, stanbon, lagbens:
Answer by solver91311(24713) About Me  (Show Source):
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45% plus 35% is 80%, so the percentage of students that got a C must be 20%. If there are students in the class then

Solve for , then calculate

John

My calculator said it, I believe it, that settles it
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Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
If 45% of the students in a course made an A; 35% made a B; and the remaining 12 students made a C, how many students in the course made an A?
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The 12 students represent 100%-[45%+35%] = 20%
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Let x be the total number of students:
Equation:
0.20x = 12
x = 12/0.2 = 120/2 = 60
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# who made A = 0.45*60 = 27
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Cheers,
Stan H.
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Answer by lagbens(14) About Me  (Show Source):
You can put this solution on YOUR website!
12 students represents %20 of the class.
so if 12----%20
x-----%45
we just have to cross multiply in order to find x, x rep. the number of students that made an a.
so it's 45 times 12 divided by 20, which gives us 27.
final answer: 27 students made an A