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If a : b is 3 : 4 and b : c is 5 : 6, what is the ratio a : b : c ?

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If a : b is 3 : 4 and b : c is 5 : 6, what is the ratio a : b : c ?  [#permalink]

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New post 17 Jan 2020, 00:00
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A
B
C
D
E

Difficulty:

  25% (medium)

Question Stats:

84% (00:44) correct 16% (01:21) wrong based on 19 sessions

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If a : b is 3 : 4 and b : c is 5 : 6, what is the ratio a : b : c ?  [#permalink]

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New post Updated on: 17 Jan 2020, 00:39
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a : b:: 3 : 4 & b : c ::5 : 6, a : b : c :: 3*5:4*5:6*4,
a : b : c :: 15:20:24

Ans. E

Bunuel, A and E are same option. Please check.

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Originally posted by Raxit85 on 17 Jan 2020, 00:07.
Last edited by Raxit85 on 17 Jan 2020, 00:39, edited 1 time in total.
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Re: If a : b is 3 : 4 and b : c is 5 : 6, what is the ratio a : b : c ?  [#permalink]

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New post 17 Jan 2020, 00:33
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Re: If a : b is 3 : 4 and b : c is 5 : 6, what is the ratio a : b : c ?  [#permalink]

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New post 17 Jan 2020, 00:41
Option E.

Common term is b,

For b=20 say,

a becomes 15 and c is 24

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Re: If a : b is 3 : 4 and b : c is 5 : 6, what is the ratio a : b : c ?  [#permalink]

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New post 17 Jan 2020, 11:10
a : b = 3 : 4 and b : c =5 : 6
a : b = 3 : 4
b : c =5 : 6
a : b = 15 : 20
b : c = 20 : 24

The ratio of a : b: c = 15:20: 24(E)
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Re: If a : b is 3 : 4 and b : c is 5 : 6, what is the ratio a : b : c ?   [#permalink] 17 Jan 2020, 11:10
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