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17 Jul 2019, 00:51
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Difficulty:
15%
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Question Stats:
86% (01:30) correct
14%
(02:02)
wrong
based on 71
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If the ratio of undergraduate students to graduate students is 7 to 4 and the ratio of graduate students to professors is 2 to 1, which could be the total number of undergraduate students, graduate students, and professors?
I. 520
II. 640
III. 2,600
A. I only
B. II only
C. III only
D. I and III only
E. I, II, and III
I. 520
II. 640
III. 2,600
A. I only
B. II only
C. III only
D. I and III only
E. I, II, and III
17 Jul 2019, 01:02
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Given UG/G =7/4
Let Ug = 7x and g = 4x
G/ p = 2
Since G = 4x
P= 2x
Sum = 2x + 4x + 7x = 13x
Sum should be a multiple of three. Since total has to be a whole number
Posted from my mobile device
Let Ug = 7x and g = 4x
G/ p = 2
Since G = 4x
P= 2x
Sum = 2x + 4x + 7x = 13x
Sum should be a multiple of three. Since total has to be a whole number
Posted from my mobile device
17 Jul 2019, 01:15
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Bookmarks
Let undergraduate students, graduate students, and professors as u,g,p.
As per question: u:g = 7:4 and g:p = 2:1
Thus, u:g:p = 7:4:2
So, using ratio proportion technique=> 7x+4x+2x = 13x
Only 1st and 3rd Answer gives integer values.
IMO the answer is D.
Please hit kudos if you like the solution.
As per question: u:g = 7:4 and g:p = 2:1
Thus, u:g:p = 7:4:2
So, using ratio proportion technique=> 7x+4x+2x = 13x
Only 1st and 3rd Answer gives integer values.
IMO the answer is D.
Please hit kudos if you like the solution.
