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On the number line shown above, the distance separating any pair of...

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New post 19 May 2019, 18:59
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84% (01:44) correct 16% (01:44) wrong based on 19 sessions

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2019-05-20_07-27-54.jpg
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On the number line shown above, the distance separating any pair of adjacent tick marks is the same. What is the value of a?

(1) a + b = 4/7

(2) 7b = 8

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On the number line shown above, the distance separating any pair of...  [#permalink]

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New post 19 May 2019, 19:51
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CAMANISHPARMAR wrote:
Attachment:
2019-05-20_07-27-54.jpg


On the number line shown above, the distance separating any pair of adjacent tick marks is the same. What is the value of a?

(1) a + b = 4/7

(2) 7b = 8


Here is my approach.

Let the length of each unit be x.

We see length of a is -2x and B is 4x .

For finding A we just need to find the value of x.Since A is -2x


STAT1:

a + b = 4/7

-2x+4x= 4/7

x= 4/14=2/7


so STAT1 is sufficient.

STAT 2:

7b=8

7*4x= 8

x = 8/28 = 2/7

So STAT 2 s suffcient.

So both statements are sufficient.

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On the number line shown above, the distance separating any pair of...   [#permalink] 19 May 2019, 19:51
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