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In the figure shown, b = ?

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In the figure shown, b = ?  [#permalink]

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New post Updated on: 21 Oct 2018, 03:21
1
2
00:00
A
B
C
D
E

Difficulty:

  25% (medium)

Question Stats:

86% (00:24) correct 14% (00:13) wrong based on 46 sessions

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In the figure shown, b = ?

(1) All the marks are equally spaced
(2) a = — 1

Source: Experts Global
Difficulty: Medium

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Originally posted by SajjadAhmad on 11 Oct 2018, 11:29.
Last edited by SajjadAhmad on 21 Oct 2018, 03:21, edited 1 time in total.
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Re: In the figure shown, b = ?  [#permalink]

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New post 11 Oct 2018, 11:38
1
SajjadAhmad wrote:
In the figure shown, b = ?

(1) All the marks are equally spaced
(2) a = — 1

EG



1) if all the marks are equally spaced

Let the increments be in 1
if a = 0 then b = 1
If a = 1 then b = 2

Insufficient.

2)

a = -1 we don’t know about the spacing and we cannot tell if be will be 0 or 1 etc..

Combined.

if the increments in 1

Then b = 0

if the increments in 2

Then b = 1

Insufficient

Answer choice E

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Re: In the figure shown, b = ?  [#permalink]

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New post 11 Oct 2018, 11:57
+1 for E

Neither individually nor using both the statements we can reach an answer.
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Re: In the figure shown, b = ?  [#permalink]

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New post 11 Oct 2018, 14:07
1
Top Contributor
SajjadAhmad wrote:
In the figure shown, b = ?

(1) All the marks are equally spaced
(2) a = — 1

EG


Target question: What is the value of b?
Go straight to.....

Statements 1 and 2 combined
There are several scenarios that satisfy BOTH statements. Here are two:
Case a: a = -1, b = 0, c = 1 and d = 2. In this case, the answer to the target question is b = 0
Case b:a = -1, b = 1, c = 3 and d = 5. In this case, the answer to the target question is b = 1
Since we cannot answer the target question with certainty, the combined statements are NOT SUFFICIENT

Answer: E

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Brent
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Re: In the figure shown, b = ?   [#permalink] 11 Oct 2018, 14:07
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In the figure shown, b = ?

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