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How many people are standing in the queue at the counter?

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Bunuel
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How many people are standing in the queue at the counter? [#permalink] New post   10 Oct 2019, 02:24
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E

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78% (00:58) correct 22% (01:02) wrong based on 89 sessions
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How many people are standing in the queue at the counter?

(1) If four more people join the queue, the number in the queue will be more than 15.
(2) If three people give up and leave the queue, the number remaining will be less than 10.
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Bunuel
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Re: How many people are standing in the queue at the counter? [#permalink] New post   10 Oct 2019, 02:29
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Bunuel wrote:
How many people are standing in the queue at the counter?

(1) If four more people join the queue, the number in the queue will be more than 15.
(2) If three people give up and leave the queue, the number remaining will be less than 10.


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Re: How many people are standing in the queue at the counter? [#permalink] New post   10 Oct 2019, 02:32
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Let A be the number of people in the queue

Statement1: A+4 >15
—> A> 11
A could be 12, 13 ... so on
Insufficient

Statement2: A—3< 10
—> A<13
A could be 12, 11 or so on
Insufficient

Combined together 1&2,
A>11 and A< 13
—> only 12 satisfies the inequality

Sufficient

The answer is C

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Re: How many people are standing in the queue at the counter? [#permalink] New post   10 Oct 2019, 05:00
(1) If four more people join the queue, the number in the queue will be more than 15.

This tells us that the number of people in the queue is more than 11. However, there is no idea about the exact number

1 is insufficient

(2) If three people give up and leave the queue, the number remaining will be less than 10.

This tells us that the number of people is less than 13. However, there is no idea about the exact number

2 is insufficient

(1)+(2)

Number of people is more than 11 and less than 13

Therefore there must be 12 people in the queue

(1)+(2) is sufficient

Answer is (C)
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Re: How many people are standing in the queue at the counter? [#permalink] New post   21 Aug 2021, 21:40
Hello from the GMAT Club BumpBot!

Thanks to another GMAT Club member, I have just discovered this valuable topic, yet it had no discussion for over a year. I am now bumping it up - doing my job. I think you may find it valuable (esp those replies with Kudos).

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Re: How many people are standing in the queue at the counter? [#permalink]
21 Aug 2021, 21:40
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