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# A new electronic security system will only allow a single person at a

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SVP
Joined: 12 Dec 2016
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Location: United States
GMAT 1: 700 Q49 V33
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A new electronic security system will only allow a single person at a  [#permalink]

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15 Dec 2017, 11:13
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Difficulty:

45% (medium)

Question Stats:

64% (01:53) correct 36% (01:58) wrong based on 422 sessions

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A new electronic security system will only allow a single person at a time to pass through a secure door. A computer decides whether or not to unlock a secure door on the basis of visual clues, which it uses to identify people with proper clearance. The shape of the head, the shape and color of the eyes, the shape and color of the lips, and other characteristics of a person’s head and face are analyzed to determine his or her identity. Only if the person trying to open a secure door has the required clearance will the door unlock. Because this new system never fails, an unauthorized person can never enter a secure door equipped with the system. If the statements above are true, which of the following conclusions can be most properly drawn?

(A) The new system is sure to be enormously successful and revolutionize the entire security industry.
(B) The new system can differentiate between people who are seeking to open a secure door and people passing by a secure door.
(C) No two people have any facial features that are identical, for example, identical lips.
(D) High costs will not make the new security system economically unviable.
(E) The new computer system is able to identify some slight facial differences between people who look very similar, such as identical twins.
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Joined: 27 Dec 2015
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Re: A new electronic security system will only allow a single person at a  [#permalink]

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16 Dec 2017, 05:25
my final choice were E and B, but why B is incorrect, it is a very strong contender.
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Re: A new electronic security system will only allow a single person at a  [#permalink]

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16 Dec 2017, 06:19
1
IIMC wrote:
my final choice were E and B, but why B is incorrect, it is a very strong contender.

Hi.

B mentions "(B) The new system can differentiate between people who are seeking to open a secure door and people passing by a secure door"
BUT there is NO difference in the OPENING and PASSING BY since it is given that it allows ONLY one person to enter. so noone can pass by unless he opens it..
Quote:
A new electronic security system will only allow a single person at a time to pass through a secure door. A computer decides whether or not to unlock a secure door on the basis of visual clues, which it uses to identify people with proper clearance.

hope it helps you to eliminate B
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1) Absolute modulus : http://gmatclub.com/forum/absolute-modulus-a-better-understanding-210849.html#p1622372
2)Combination of similar and dissimilar things : http://gmatclub.com/forum/topic215915.html
3) effects of arithmetic operations : https://gmatclub.com/forum/effects-of-arithmetic-operations-on-fractions-269413.html
4) Base while finding % increase and % decrease : https://gmatclub.com/forum/percentage-increase-decrease-what-should-be-the-denominator-287528.html

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Re: A new electronic security system will only allow a single person at a  [#permalink]

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17 Dec 2017, 05:56
chesstitans IIMC
Adding to chetan2u 's answer, notice that the system only operates when someone tries to open a secure door. It doesn't even apply to people who are just passing by...
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Re: A new electronic security system will only allow a single person at a  [#permalink]

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18 Dec 2017, 06:58
I'm stuck between C and E... both seem to be similar. chetan sir can you differentiate between the two choices?
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Re: A new electronic security system will only allow a single person at a  [#permalink]

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18 Dec 2017, 09:29
harsha3699 wrote:
I'm stuck between C and E... both seem to be similar. chetan sir can you differentiate between the two choices?

harsha3699
They would amount to the same thing IF (C) would say that no two people can share ALL of the same facial characteristics. But it doesn't say that - it says that they can't share even one part. This is not stated in the text, and doesn't have to be true for the system to work: people can have identical lips, but because their eyes are different, the system will work.
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Re: A new electronic security system will only allow a single person at a  [#permalink]

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18 Dec 2017, 09:37
harsha3699 wrote:
I'm stuck between C and E... both seem to be similar. chetan sir can you differentiate between the two choices?

Hi Harsha..

What should be a CONCLUSION. something that flows out of the PARA and is in the core of the discussion.
here the point being talked of is THE NEW SYSTEM so the conclusion should talk of something concerning it..
Even if B is correct, it can just be a premise or a fact helping in some conclusion about te new system..
_________________

1) Absolute modulus : http://gmatclub.com/forum/absolute-modulus-a-better-understanding-210849.html#p1622372
2)Combination of similar and dissimilar things : http://gmatclub.com/forum/topic215915.html
3) effects of arithmetic operations : https://gmatclub.com/forum/effects-of-arithmetic-operations-on-fractions-269413.html
4) Base while finding % increase and % decrease : https://gmatclub.com/forum/percentage-increase-decrease-what-should-be-the-denominator-287528.html

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Re: A new electronic security system will only allow a single person at a  [#permalink]

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18 Dec 2017, 19:51
1
DAVEexamPAL wrote:
harsha3699 wrote:
I'm stuck between C and E... both seem to be similar. chetan sir can you differentiate between the two choices?

harsha3699
They would amount to the same thing IF (C) would say that no two people can share ALL of the same facial characteristics. But it doesn't say that - it says that they can't share even one part. This is not stated in the text, and doesn't have to be true for the system to work: people can have identical lips, but because their eyes are different, the system will work.

Thank you sir!! To the point !! I see that I should read the options more closely.
Thank you again.

Sent from my iPhone using GMAT Club Forum mobile app
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Re: A new electronic security system will only allow a single person at a  [#permalink]

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18 Dec 2017, 19:52
chetan2u wrote:
harsha3699 wrote:
I'm stuck between C and E... both seem to be similar. chetan sir can you differentiate between the two choices?

Hi Harsha..

What should be a CONCLUSION. something that flows out of the PARA and is in the core of the discussion.
here the point being talked of is THE NEW SYSTEM so the conclusion should talk of something concerning it..
Even if B is correct, it can just be a premise or a fact helping in some conclusion about te new system..

Thank you sir!! I was clear with option B.. yeah got your point of keeping the conclusion within reach of the para.. need to work on that aspect.
Thank you again!

Sent from my iPhone using GMAT Club Forum mobile app
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Re: A new electronic security system will only allow a single person at a  [#permalink]

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20 Dec 2018, 10:29
I do not see how choice E is supported by the passage. Can anyone point this out please?
Re: A new electronic security system will only allow a single person at a   [#permalink] 20 Dec 2018, 10:29
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