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Ratio of A and B is 3:5, B and C is 4:7 and C:D is 2:3. What is A:D?

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Ratio of A and B is 3:5, B and C is 4:7 and C:D is 2:3. What is A:D?  [#permalink]

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New post 23 Jan 2020, 08:04
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A
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C
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  25% (medium)

Question Stats:

84% (01:52) correct 16% (01:57) wrong based on 32 sessions

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Ratio of A and B is 3:5, B and C is 4:7 and C:D is 2:3. What is A:D?
A. 1:1
B. 2:3
C. 8:35
D. 7:33
E. 5:28

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Re: Ratio of A and B is 3:5, B and C is 4:7 and C:D is 2:3. What is A:D?  [#permalink]

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New post 23 Jan 2020, 19:36
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TheNightKing wrote:
Ratio of A and B is 3:5, B and C is 4:7 and C:D is 2:3. What is A:D?
A. 1:1
B. 2:3
C. 8:35
D. 7:33
E. 5:28


Explanation:

A/B x B/C x C/D = 3/5 x 4/7 x 2/3
A/D = 8/35

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Re: Ratio of A and B is 3:5, B and C is 4:7 and C:D is 2:3. What is A:D?  [#permalink]

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New post 24 Jan 2020, 10:16
TheNightKing wrote:
Ratio of A and B is 3:5, B and C is 4:7 and C:D is 2:3. What is A:D?
A. 1:1
B. 2:3
C. 8:35
D. 7:33
E. 5:28


A : B = 3 : 5
B : C = 4 : 7

So, A : B : C = 12 : 20 : 35

C : D = 2 : 3

Now, A : B : C : D = 24 : 40 : 70 : 105

So, A : D = 24 : 105 = 8 : 35 , Answer must be (C)
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Re: Ratio of A and B is 3:5, B and C is 4:7 and C:D is 2:3. What is A:D?   [#permalink] 24 Jan 2020, 10:16
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Ratio of A and B is 3:5, B and C is 4:7 and C:D is 2:3. What is A:D?

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