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DHAR
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A new water pump was fixed in a locality of 1200 people. They were ask 04 Feb 2018, 12:51
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Difficulty:

55% (hard)

Question Stats:

69% (02:57) correct 31% (02:48) wrong based on 210 sessions

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A new water pump was fixed in a locality of 1200 people. They were asked to give ratings to the purity of new water supply and the old one. The feedback is shown in the table below, more number of stars means better the quality.

If 3 or 2 star rating implies dissatisfaction and 275 people, who gave 5 star rating to old water supply, disliked the new one, how many did not like any of the two?

(A) 225
(B) 250
(C) 500
(D) 550
(E) 650

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Attachment:
2018-02-05 01_17_10-Microsoft Office 2010.png
2018-02-05 01_17_10-Microsoft Office 2010.png [ 334.95 KiB | Viewed 6345 times ]
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chetan2u
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A new water pump was fixed in a locality of 1200 people. They were ask 05 Feb 2018, 20:03
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kkrrsshh
chetan2u
DHAR

A new water pump was fixed in a locality of 1200 people. They were asked to give ratings to the purity of new water supply and the old one. The feedback is shown in the table below, more number of stars means better the quality.

If 3 or 2 star rating implies dissatisfaction and 275 people, who gave 5 star rating to old water supply, disliked the new one, how many did not like any of the two?

(A) 225
(B) 250
(C) 500
(D) 550
(E) 650

Show Spoiler
Attachment:
2018-02-05 01_17_10-Microsoft Office 2010.png

More likely to be an IR question..
we have 275 out of 450 who gave 5-star rating to only OLD ..
so the dissatisfied customers of new will contain this 275..
so number of people dissatisfied with both = number of dissatisfied with new - 275 = 225+600-275=550

D

Hi chetan2u,
Thanks for the explanation.
But I can't get around the logic here. No. of dissatisfied with new = 825.
275 cust have given 5-star to only Old, so 275 are dissatisfied with new.
So,how do we know there are customers in '825', who dislike Old?
Also, can you please tell why we are subtracting 275 from 825; how do we know there is redundancy of 275 in 825?
Show more

Another way

It is given OLD-
Dissatisfied-50+700=750 ; satisfied-450; Total-1200

NEW-
Dissatisfied-225+600-825; satisfied-375; Total-1200

Now it is given 275 who were satisfied with Old are not satisfied with new.
So 450-275=175 are satisfied with both..
These 175 are in new satisfied also, so those only satisfied with new = 375-175=200..

Total satisfied with atleast 1= \(200+175+275=650..\)
Therefore those not satisfied with any = \(1200-650=550\)..
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A new water pump was fixed in a locality of 1200 people. They were ask 04 Feb 2018, 19:26
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DHAR

A new water pump was fixed in a locality of 1200 people. They were asked to give ratings to the purity of new water supply and the old one. The feedback is shown in the table below, more number of stars means better the quality.

If 3 or 2 star rating implies dissatisfaction and 275 people, who gave 5 star rating to old water supply, disliked the new one, how many did not like any of the two?

(A) 225
(B) 250
(C) 500
(D) 550
(E) 650

Show Spoiler
Attachment:
2018-02-05 01_17_10-Microsoft Office 2010.png
Show more

More likely to be an IR question..
we have 275 out of 450 who gave 5-star rating to only OLD ..
so the dissatisfied customers of new will contain this 275..
so number of people dissatisfied with both = number of dissatisfied with new - 275 = 225+600-275=550

D
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kkrrsshh
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A new water pump was fixed in a locality of 1200 people. They were ask 05 Feb 2018, 19:49
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chetan2u
DHAR

A new water pump was fixed in a locality of 1200 people. They were asked to give ratings to the purity of new water supply and the old one. The feedback is shown in the table below, more number of stars means better the quality.

If 3 or 2 star rating implies dissatisfaction and 275 people, who gave 5 star rating to old water supply, disliked the new one, how many did not like any of the two?

(A) 225
(B) 250
(C) 500
(D) 550
(E) 650

Show Spoiler
Attachment:
2018-02-05 01_17_10-Microsoft Office 2010.png

More likely to be an IR question..
we have 275 out of 450 who gave 5-star rating to only OLD ..
so the dissatisfied customers of new will contain this 275..
so number of people dissatisfied with both = number of dissatisfied with new - 275 = 225+600-275=550

D
Show more

Hi chetan2u,
Thanks for the explanation.
But I can't get around the logic here. No. of dissatisfied with new = 825.
275 cust have given 5-star to only Old, so 275 are dissatisfied with new.
So,how do we know there are customers in '825', who dislike Old?
Also, can you please tell why we are subtracting 275 from 825; how do we know there is redundancy of 275 in 825?
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A new water pump was fixed in a locality of 1200 people. They were ask 07 Nov 2025, 02:23
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any other way to solve this? using table matrix..but in table matrix what would be the divisions then?
chetan2u


Another way

It is given OLD-
Dissatisfied-50+700=750 ; satisfied-450; Total-1200

NEW-
Dissatisfied-225+600-825; satisfied-375; Total-1200

Now it is given 275 who were satisfied with Old are not satisfied with new.
So 450-275=175 are satisfied with both..
These 175 are in new satisfied also, so those only satisfied with new = 375-175=200..

Total satisfied with atleast 1= \(200+175+275=650..\)
Therefore those not satisfied with any = \(1200-650=550\)..
Show more
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