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31 Jan 2007, 06:17
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E
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
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Four extra-large sandwiches of exactly the same size were ordered for m students, where m > 4. Three of the sandwiches were evenly divided among the students. Since 4 students did not want any of the fourth sandwich, it was evenly divided among the remaining students. If Carol ate one piece from each of the four sandwiches, the amount of sandwich that she ate would be what fraction of a whole extra-large sandwich?
(A) m+4/m(m-4)
(B) 2m-4/m(m-4)
(C) 4m-4/m(m-4)
(D) 4m-8/m(m-4)
(E) 4m-12/m(m-4)
(A) m+4/m(m-4)
(B) 2m-4/m(m-4)
(C) 4m-4/m(m-4)
(D) 4m-8/m(m-4)
(E) 4m-12/m(m-4)
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31 Jan 2007, 06:25
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3 sandwiches divided like this: 3/m
The last 1 sadwich divided like this: 1/(m-4)
If carol had one piece from each sandwich, that means she had (or at least I hope she did..
):
(3/m+1/m-4) = 4m-12/m(m-4)
The last 1 sadwich divided like this: 1/(m-4)
If carol had one piece from each sandwich, that means she had (or at least I hope she did..
):
(3/m+1/m-4) = 4m-12/m(m-4)
31 Jan 2007, 07:09
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TOUGH GUY
Good word problem!
There are total m students
Three of the sandwiches were evenly divided among the students
=> 3/m sandwich/student
4 students did not want any of the fourth sandwich
=> (m - 4) students still want the 4th sandwich (you greedy pigs!)
the 4th sandwich was evenly divided among the remaining students
=> 1/(m-4) sandwich/student
Carol got every piece that was divided (one of all the pigs from the group
)
=> (3/m) + (1/(m-4))
the amount of sandwich that she ate would be what fraction of a whole extra-large sandwich
=> [(3/m) + (1/(m-4)] / 1
=> (3*(m-4) + 1*m)/(m*(m-4))
=> (3m - 12 + m)/(m*(m-4)
=> (4m - 12)/m(m-4)
E. is the answer
