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mrmikec
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In a certain class, 72% of the male students and 80% of the 16 Jun 2006, 18:08
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In a certain class, 72% of the male students and 80% of the female students have applied for college. What fraction of the students in the class are male?

C1: there are a total of 840 studnents in the class
C2: 75% of the students in the class have applied to college.



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In a certain class, 72% of the male students and 80% of the 16 Jun 2006, 18:58
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Is it B?

female = f, male = m, Total = T = m + f

St1: m + f = T = 840. Can't find anything

St2: 0.75T = 0.72m + 0.8f i.e 0.75 (m+f) = 0.72m + 0.8f

i.e 0.75m + 0.75m = 0.72m + 0.8f
i.e 0.03m = 0.05f i.e m/f = 5/3

So fraction of male students is 5/8
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In a certain class, 72% of the male students and 80% of the 17 Jun 2006, 00:45
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Yep its B. Don't need numbers to get the fraction.
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willget800
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In a certain class, 72% of the male students and 80% of the 18 Jun 2006, 02:01
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E...
How do you know the all the students were accepted?
it says what fraction of the students in the class are male?
not applied?
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necromonger
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In a certain class, 72% of the male students and 80% of the 18 Jun 2006, 10:47
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mrmikec
In a certain class, 72% of the male students and 80% of the female students have applied for college. What fraction of the students in the class are male?

C1: there are a total of 840 studnents in the class
C2: 75% of the students in the class have applied to college.
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Willget, don't read more into a question than what is already written.

Anyway,

TotalStudents = M+F
(A) tells us nothing about the total number, so not sufficient.
(B) gives us a way to formulate an equation,

so (0.75)t = (0.72m)+(0.8f);

so (B), we don't need numbers to get a fraction.
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In a certain class, 72% of the male students and 80% of the 19 Jun 2006, 18:09
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I am still shakey with B. How do you get a fraction from:

(0.75)t = (0.72m)+(0.8f) ?

Arent all of the variables in this equation different terms? Meaning that the fraction could change according to the number of males, females, T.... Could someone please explain?
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In a certain class, 72% of the male students and 80% of the 19 Jun 2006, 20:16
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ps_dahiya
Is it B?

female = f, male = m, Total = T = m + f

St1: m + f = T = 840. Can't find anything

St2: 0.75T = 0.72m + 0.8f i.e 0.75 (m+f) = 0.72m + 0.8f

i.e 0.75m + 0.75m = 0.72m + 0.8f
i.e 0.03m = 0.05f i.e m/f = 5/3

So fraction of male students is 5/8
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I know it isnt relevant to the answer, but should it be 5/8 or 3/8??
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In a certain class, 72% of the male students and 80% of the 20 Jun 2006, 00:03
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rdw28
I am still shakey with B. How do you get a fraction from:

(0.75)t = (0.72m)+(0.8f) ?

Arent all of the variables in this equation different terms? Meaning that the fraction could change according to the number of males, females, T.... Could someone please explain?
Show more


Replace t with m+f and you have
0.75(m+f)=0.72m+0.8f
0.75m+0.75f=0.72m+0.8f
0.75m-0.72m=0.8f-0.75f
0.03m=0.05f
3m=5f
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In a certain class, 72% of the male students and 80% of the 20 Jun 2006, 11:57
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necromonger
mrmikec
In a certain class, 72% of the male students and 80% of the female students have applied for college. What fraction of the students in the class are male?

C1: there are a total of 840 studnents in the class
C2: 75% of the students in the class have applied to college.

Willget, don't read more into a question than what is already written.

Anyway,

TotalStudents = M+F
(A) tells us nothing about the total number, so not sufficient.
(B) gives us a way to formulate an equation,

so (0.75)t = (0.72m)+(0.8f);

so (B), we don't need numbers to get a fraction.
Show more


Don't worry willget! I have the same problem too :lol:



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Hi there,
This topic has been closed and archived due to inactivity or violation of community quality standards. No more replies are possible here.
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Still interested in this question? Check out the "Best Topics" block above for a better discussion on this exact question, as well as several more related questions.
Thank you for understanding, and happy exploring!
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