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Dursley's

by knight247 » Tue Aug 23, 2011 10:37 am
The Dursleys decided that their monthly electricity expenditure for the month of June should not exceed that of the previous month (May) by more than $80. What was the electricity bill of the Dursleys for the months of May?
(1) The electricity bill of the Dursleys for the month of June was $160
(2) The collective electricity bill of the Dursleys for the months of May and June did not exceed $240

Don't have an OA. Detailed explanations would be appreciated. Thanks
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by ashutoshsingh99 » Tue Aug 23, 2011 11:12 am
Hi,

The answer should be C.
Condition given in Ques: Statement I j-m<=80
1st cond: Statement II j=160

Solving I & II for m ie. m>=80 Statement III

2nd cond: Statement IV m+j<=240

Solving I & III gives j<=160 and not the value of m. So, the answer is not A or B.

Solving II & IV gives m<=80 Statement V

So, Statement V & Statement III can only be true when m=80. So, j=160.

Answer is then "C".

Regards,
Ashu
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by BlindVision » Tue Aug 23, 2011 1:49 pm
knight247 wrote:The Dursleys decided that their monthly electricity expenditure for the month of June should not exceed that of the previous month (May) by more than $80. What was the electricity bill of the Dursleys for the months of May?
(1) The electricity bill of the Dursleys for the month of June was $160
(2) The collective electricity bill of the Dursleys for the months of May and June did not exceed $240

Don't have an OA. Detailed explanations would be appreciated. Thanks
Please tell me if I'm missing something...

Statement I: Only tells us June's $160 electricity bill but not May's.

Statement II: Tells us the collective bill of May and June did not exceed $240, but doesn't tell us what is exactly May's bill. May's bill could've been as little as $1 or as much as $80.

Chose E
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by akhilsuhag » Tue Aug 23, 2011 2:10 pm
I change my solution. I think Ashutosh is correct!!

Really got me thinking!!
Last edited by akhilsuhag on Tue Aug 23, 2011 2:18 pm, edited 1 time in total.
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by akhilsuhag » Tue Aug 23, 2011 2:15 pm
I like the way ashutoshsingh99 approacched the problem.

I think he might be right here. Eagerly awaiting the OA.

Nice question btw!!
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