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1st
graders: 12 3rd
graders: 15
graders: 12 3rd
graders: 15
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
35%
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Question Stats:
77% (02:21) correct
23%
(02:41)
wrong
based on 3673
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At a certain school, the ratio of the number of 2nd graders to the number of 4th graders is 8 to 5; the ratio of the number of 1st graders to the number of 2nd graders is 3 to 4; and the ratio of the number of 3rd graders to the number of 4th graders is 3 to 2
In the table, select a value for the number of 1st graders and the number of 3rd graders, so that the two numbers are jointly consistent with the information provided. Make only two selections, one in each column.
In the table, select a value for the number of 1st graders and the number of 3rd graders, so that the two numbers are jointly consistent with the information provided. Make only two selections, one in each column.
|
1st graders |
3rd graders |
Values |
| 4 | ||
| 8 | ||
| 12 | ||
| 14 | ||
| 15 |
ShowHide Answer
Official Answer
1st
graders: 12 3rd
graders: 15
graders: 12 3rd
graders: 15
07 May 2013, 07:57
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Just doing like this : 1st graders (a), 2nd graders (b), 3rd graders (c), and 4th graders (d) for ease.
a/b = 3/4.
b/d = 8/5
c/d= 3/2.
a/c = ??
a/c = a/b * b/d * d/c
= 3/4 * 8/5 * 2/3
a/c = 4/5 . .
So this satisfied by a= 12, and b = 15 . .
a/b = 3/4.
b/d = 8/5
c/d= 3/2.
a/c = ??
a/c = a/b * b/d * d/c
= 3/4 * 8/5 * 2/3
a/c = 4/5 . .
So this satisfied by a= 12, and b = 15 . .
General Discussion
pratsh123
Joined: 25 Apr 2013
Last visit: 11 Oct 2013
Posts: 4
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Given Kudos: 5
Location: India
Concentration: Strategy, Marketing
Schools: INSEAD Jan '15
GPA: 2.7
WE:Information Technology (Computer Software)
10 May 2013, 22:53
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Hi,
Multiplying the ratios to get ratio of 1st graders: 3rd graders = 4:5.
This can be clearly seen for values 12:15.Hence 1st Graders = 12 & 3rd Graders = 15 out of the given set of values.
Thanks & Regards,
Prateek Sharma.
Multiplying the ratios to get ratio of 1st graders: 3rd graders = 4:5.
This can be clearly seen for values 12:15.Hence 1st Graders = 12 & 3rd Graders = 15 out of the given set of values.
Thanks & Regards,
Prateek Sharma.
