BREAKING: Target Test Prep releases Brand New 2026 On Demand GMAT prep course

Redeem

Test Match

This topic has expert replies
Post new topic Post Reply
Previous Topic Next Topic
User avatar
Legendary Member
Posts: 1132
Joined: Mon Jul 20, 2009 3:38 am
Location: India
Thanked: 64 times
Followed by:6 members
GMAT Score:760

Test Match

by harsh.champ » Fri Feb 19, 2010 5:39 am
The average temperature of the first 3 days of a test match was 25degrees. The average temperature of the 2nd,3rd and 4th day was 24degrees. If the temperature on the 4th day was 27degrees, what was the temperature on the 1st day?

A. 21 degrees
B. 24 degrees
C. 27 degrees
D. 30 degrees
E. 31 degrees

The OA is D.
Last edited by harsh.champ on Fri Feb 19, 2010 7:37 am, edited 1 time in total.
It takes time and effort to explain, so if my comment helped you please press Thanks button :)



Just because something is hard doesn't mean you shouldn't try,it means you should just try harder.

"Keep Walking" - Johnny Walker :P
Top
Source: — Problem Solving |
User avatar
Legendary Member
Posts: 1022
Joined: Mon Jul 20, 2009 11:49 pm
Location: Gandhinagar
Thanked: 41 times
Followed by:2 members

by shashank.ism » Fri Feb 19, 2010 7:30 am
harsh.champ wrote:The average temperature of the first 3 days of a test match was 25degrees. The average temperature of the 2nd,3rd and 4th day was 24degrees. If the temperature on the 4th day was 270, what was the temperature on the 1st day?

A. 21 degrees
B. 24 degrees
C. 27 degrees
D. 30 degrees
E. 31 degrees

The OA is D.
I think there is some problem in question harsh how can temp of 4th day be 270 degrees when avg of 2nd,3rd and 4th day was 24degrees..
Please check it...
My Websites:
www.mba.webmaggu.com - India's social Network for MBA Aspirants

www.deal.webmaggu.com -India's online discount, coupon, free stuff informer.

www.dictionary.webmaggu.com - A compact free online dictionary with images.

Nothing is Impossible, even Impossible says I'm possible.
Top
User avatar
Legendary Member
Posts: 1022
Joined: Mon Jul 20, 2009 11:49 pm
Location: Gandhinagar
Thanked: 41 times
Followed by:2 members

by shashank.ism » Fri Feb 19, 2010 7:43 am
ok so if av temp is 27 instead of 270 ,
let the days be denoted by alphabets A,B,C,D,E
A+B+C = 75
B+C+D =72
D=27
-->B+C =72-27 =45
--> A= 75 - (A+B) = 75- 45 = 30 Ans D
My Websites:
www.mba.webmaggu.com - India's social Network for MBA Aspirants

www.deal.webmaggu.com -India's online discount, coupon, free stuff informer.

www.dictionary.webmaggu.com - A compact free online dictionary with images.

Nothing is Impossible, even Impossible says I'm possible.
Top
Legendary Member
Posts: 610
Joined: Fri Jan 15, 2010 12:33 am
Thanked: 47 times
Followed by:2 members

by kstv » Fri Feb 19, 2010 8:50 am
IMO D

Temp of 4th day was 27 i.e. 3 degree more than the avg.
So the combined temp of 2nd & 3rd day was (24+ 24 -3) = 45.
The temp of the 1st day (25 X 3 - 45)
Top
User avatar
Legendary Member
Posts: 1022
Joined: Mon Jul 20, 2009 11:49 pm
Location: Gandhinagar
Thanked: 41 times
Followed by:2 members

by shashank.ism » Fri Feb 19, 2010 10:22 am
kstv wrote:IMO D

Temp of 4th day was 27 i.e. 3 degree more than the avg.
So the combined temp of 2nd & 3rd day was (24+ 24 -3) = 45.
The temp of the 1st day (25 X 3 - 45)
kstv u have solved the problem with a slightly different approach. but I really liked your solution, it will save my time....
My Websites:
www.mba.webmaggu.com - India's social Network for MBA Aspirants

www.deal.webmaggu.com -India's online discount, coupon, free stuff informer.

www.dictionary.webmaggu.com - A compact free online dictionary with images.

Nothing is Impossible, even Impossible says I'm possible.
Top
User avatar
Legendary Member
Posts: 526
Joined: Sat Feb 21, 2009 11:47 pm
Location: India
Thanked: 68 times
GMAT Score:680

by harshavardhanc » Fri Feb 19, 2010 10:49 am
harsh.champ wrote:The average temperature of the first 3 days of a test match was 25degrees. The average temperature of the 2nd,3rd and 4th day was 24degrees. If the temperature on the 4th day was 27degrees, what was the temperature on the 1st day?

A. 21 degrees
B. 24 degrees
C. 27 degrees
D. 30 degrees
E. 31 degrees

The OA is D.
replacing day1 by day4 decreases avg by 1.
i.e in effect decreases 3 degrees from the total.


OR

replacing day4 by day1 increases the avg by 1.
i.e in effect increases 3 degrees in the total.



Hence, (day2 and day3 constant), day1 has to be day4 + 3 degrees.

27+3 = 30 :)
Regards,
Harsha
Top
Post new topic Post Reply
• Page 1 of 1