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

Redeem

Pens and Pencils

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

Pens and Pencils

by harsh.champ » Fri Feb 19, 2010 6:05 am
Average cost of 5 pens and 4 pencils is Rs. 36. The average cost of 7 pens and 8 pencils is Rs. 48. Find the total cost of 24 pens and 24 pencils.

A. 324
B. 720
C. 1000
D. 1044
E. 2088

The OA is E.

Try to do this via shortcut method.
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 |
Master | Next Rank: 500 Posts
Posts: 173
Joined: Tue Jul 07, 2009 11:18 pm
Location: Hyderabad
Thanked: 12 times

by vijay_venky » Fri Feb 19, 2010 6:48 am
Total cost of 5 pens and 4 pencils=36x9=324
Total cost of 7 pens and 8 pencils=48x15=720


Total cost of 12 pens and 12 pencils=1044
So total cost of 24 pens and 24 pencils = 2088
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 6:55 am
harsh.champ wrote:Average cost of 5 pens and 4 pencils is Rs. 36. The average cost of 7 pens and 8 pencils is Rs. 48. Find the total cost of 24 pens and 24 pencils.

A. 324
B. 720
C. 1000
D. 1044
E. 2088

The OA is E.

Try to do this via shortcut method.
x= pens and y = pencil
5x+4y=36x9 =324
7x+8y=48x15= 720
add both 12x+12y = 1044 --> 24x+24 y = 1044x2 = 2088 Ans E...i think this is the shortest....
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: 1132
Joined: Mon Jul 20, 2009 3:38 am
Location: India
Thanked: 64 times
Followed by:6 members
GMAT Score:760

by harsh.champ » Fri Feb 19, 2010 7:15 am
Good vijay_venky and shashank.ism,
You guys solved it by the shortcut technique.When I solved the question for the 1st time,I solved both the equations and got the value of x and y.
Then,I had put those values in the equation:-24(x + y)
Solving by this method took a lot of time.
This question is a perfect example as to how in quant you can save time by adopting shortcut approach.
Thats why I ad specially mentioned to solve the question via the shorter method.
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
Post new topic Post Reply
• Page 1 of 1