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On a certain engineering team, the ratio of engineers with [#permalink]
 15 Feb 2005, 18:50
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On a certain engineering team, the ratio of engineers with advanced degrees to those with bachelor's degrees is 5 to 8. Were 4 more engineers with advanced degrees to join the team, the ratio would be 3 to 4. How many engineers are on the team altogether?
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A/B = 5/8
and (A+4)/B = 3/4
i.e. A/B + 4/B = 3/4
5/8 + 4/B = 3/4
So, B = 32 and A = 20
A+B = 52
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Current Student
Joined: 28 Dec 2004
Posts: 3439
Location: New York City
Schools: Wharton'11 HBS'12
Followers: 11
Kudos [?]:
134
[0], given: 2
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I got this one wrong! I did the following
A= advanced degrees
b= bachelors
A/B=5/8
(A+4)/b=3/4
solve the 2 equations....
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GMAT Club Legend
Joined: 07 Jul 2004
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A/B = 5/8 (A = advanced, B = bachelor)
A = 5x/13, B= 8x/13 (x= total number on team)
Adding 4 to A gives: A = 5x/12 + 4 = 5x+3/12
A/B = 3/4 = 5x+52/12 * 12/8x = 5x+52/8x
Solve for x:
x = 52
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Current Student
Joined: 28 Dec 2004
Posts: 3439
Location: New York City
Schools: Wharton'11 HBS'12
Followers: 11
Kudos [?]:
134
[0], given: 2
|
OA is 52.....
but as always pay attention to the problem....I selected 20! totally forgot the question was asking about total number of engineers..... 
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