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25 Sep 2019, 01:04
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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)!
Difficulty:
5%
(low)
Question Stats:
90% (00:33) correct
10%
(00:32)
wrong
based on 72
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The ratio of girls to boys in a class is 6:7. If there are 18 girls, how many total students are in the class?
A. 18
B. 21
C. 27
D. 28
E. 39
A. 18
B. 21
C. 27
D. 28
E. 39
25 Sep 2019, 01:17
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G : B = 6 : 7
Which is same as 6x : 7x (as we can’t reduce this further)
We’re given 6x = 18
X=3
Therefore, boys = 7x = 7(3) = 21
Total students = girls + and boys =
21+18 = 39
option E
Or
Given
G : B = 6 : 7
total 6x+7x = 13x
6x =18
X=3
Therefore, total Students= 13(3)= 39
Option E
Posted from my mobile device
Which is same as 6x : 7x (as we can’t reduce this further)
We’re given 6x = 18
X=3
Therefore, boys = 7x = 7(3) = 21
Total students = girls + and boys =
21+18 = 39
option E
Or
Given
G : B = 6 : 7
total 6x+7x = 13x
6x =18
X=3
Therefore, total Students= 13(3)= 39
Option E
Posted from my mobile device
25 Sep 2019, 01:34
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The number of Girls =6x
The number of Boys =7x
Total=6x+7x=13x
We are given 6x=18 --> x=3
so total=13x=13*3=39
IMO
Ans: E
The number of Boys =7x
Total=6x+7x=13x
We are given 6x=18 --> x=3
so total=13x=13*3=39
IMO
Ans: E
