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 Post subject: Data Suff Page 121 QUESTION 97Posted: Thu Sep 02, 2010 3:18 pm

Joined: Fri Aug 06, 2010 9:15 pm
Posts: 6
Why is B sufficient?

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 Post subject: Re: Data Suff Page 121 QUESTION 97Posted: Thu Sep 02, 2010 6:16 pm

Joined: Thu Feb 12, 2009 6:32 pm
Posts: 497
Statement (2) is not sufficient

the mean for June, July, and August was 75. So the total was 75*3 = 225

if the sum for July + August was 160, the amount for June must have been 225 - 160 = 65.

All we know is that June did not have the highest bill. We have many possibilities for July and August:

10 + 150

30 + 130

80 + 80

70 + 90

etc.

-- Veritas Help

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 Post subject: Re: Data Suff Page 121 QUESTION 97Posted: Thu Sep 02, 2010 6:59 pm

Joined: Fri Aug 06, 2010 9:15 pm
Posts: 6
Again, you answered me the wrong question. You answered number 73 but I ask for number 97 page 121 Data Suff.

Question: In the figure above, QRS is a striaght line......

Please explain why B is sufficient. Thank you.

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 Post subject: Re: Data Suff Page 121 QUESTION 97Posted: Fri Sep 03, 2010 4:20 pm

Joined: Thu Feb 12, 2009 6:32 pm
Posts: 497
q = angle PQR
p = angle QPR
r = angle PRQ
x = angle PRT
y = angle TRS

p = q since QR = PR ... so r + 2p = 180

from (2) x = y ... so r + 2x = 180

r + 2x = 180

r + 2p = 180

r + 2x = r + 2p

x = p ... since x = p QP i parallel to TR

x and p are opposite interior angles to lines QP and TR (which is intersected by PR) when opposite interior angles are equal the corresponding lines are parallel

-- Veritas Help

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