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Percentages
Hi could you please help me out with this question
In a certain class the boys were reduced by 20% and the girls by 30%. After the reduction the total number of students in the class is 260. How many students were in the class before the reduction?
- by kaf
Mon Jul 27, 2009 4:16 pm- Forum: Problem Solving
- Topic: Percentages
- Replies: 1
- Views: 1265
DS question
For each month of next year, Company R's monthly revenue target is x dollars greater than its monthly revenue target for the preceding month. What is Company R's revenue target for March of next year? 1 Company R's revenue target for December of next year is 310,000 2 Company R's revenue target for ...
- by kaf
Tue Apr 14, 2009 1:50 pm- Forum: Data Sufficiency
- Topic: DS question
- Replies: 3
- Views: 1879
- by kaf
Mon Apr 13, 2009 3:06 pm- Forum: Data Sufficiency
- Topic: Between A and B
- Replies: 9
- Views: 5990
range question
Hi can someone please help explain the solution to this
The number of years of service of the eight employees in a production department are 15, 10, 9, 17, 6, 4, 14 and 16. What is the range in the number of years of service of the eight employees?
A. 10
B. 11
C. 12
D. 13
E. 14
Thanks
- by kaf
Sun Apr 12, 2009 3:52 pm- Forum: Problem Solving
- Topic: range question
- Replies: 2
- Views: 1611
Krisraam can you please elaborate on the steps yo your solutionkrisraam wrote:x = y ( 1000/(60*60))
y = 18x/5
Thanks
Raama
thanks
- by kaf
Thu Apr 09, 2009 2:22 am- Forum: Problem Solving
- Topic: x meters per second is y kilometers per hour...
- Replies: 8
- Views: 7982
Can someone please confirm this if this is standard formulaaatech wrote:QS is height of the triangle PQR...
Ht of equilateral traingle is calculated by formula
(root3)/2 * side
This is a std formula
thanks
- by kaf
Wed Apr 08, 2009 1:43 pm- Forum: Problem Solving
- Topic: GMAT Prep (Pract2) Equilateral Triangle
- Replies: 9
- Views: 2305
This question has been answered and explained thoroughly here
http://www.beatthegmat.com/gmat-prep-qu ... 21502.html
- by kaf
Wed Apr 08, 2009 4:20 am- Forum: Problem Solving
- Topic: certain sequence is given
- Replies: 1
- Views: 973
This question has been answered and explained thoroughly here
http://www.beatthegmat.com/greatest-pri ... 14712.html
- by kaf
Wed Apr 08, 2009 4:15 am- Forum: Problem Solving
- Topic: the greatest prime factor
- Replies: 1
- Views: 1006
- by kaf
Wed Apr 08, 2009 3:47 am- Forum: Problem Solving
- Topic: PS
- Replies: 10
- Views: 2028
I have serious problems with exponent questions.moutar wrote:(3^(x-1))^3
= 3^(3x-3)
= 3^3x /3^3
= ((3^6x)^1/2)/27
= (8100^1/2)/27
= 90/27
= 10/3 = D
Much nicer.
Moutar can you please explain how
= 3^3x /3^3 transformed to become
= ((3^6x)^1/2)/27
thanks in advance
- by kaf
Wed Apr 08, 2009 2:29 am- Forum: Problem Solving
- Topic: PS
- Replies: 10
- Views: 2028
percentages again
With the success of the MP3 format, CD retailer Musicfest is going out of business. At first the store discounted all its albums 40%. Today, the store is adding an additional discount of 25% off the already discounted price of albums. The two discounts are equal to a total discount of: A.70% B.55% C...
- by kaf
Thu Apr 02, 2009 11:32 pm- Forum: Problem Solving
- Topic: percentages again
- Replies: 2
- Views: 1255
Percentages
Can someoone please help in explaning the solution to this question At the candy shop, Calvin purchased 24 chocolate bars and 10 gumdrops. If the cost of each chocolate bar is ten times the cost of each gum drop, what percent of the total purchase price was the cost of all of the gum drops? A.8% B.6...
- by kaf
Thu Apr 02, 2009 11:31 pm- Forum: Problem Solving
- Topic: Percentages
- Replies: 2
- Views: 1227
Cricles
Solution and explanation please
Increasing a circle's radius by 20%, causes the circle's area to increase by how much?
A.100%
B.60%
C.44%
D.40%
E. 25%
- by kaf
Thu Apr 02, 2009 2:34 pm- Forum: Problem Solving
- Topic: Cricles
- Replies: 3
- Views: 1333
Stuart could you please post the diagram you used for your solution so some of us can understand the solution
thanks
- by kaf
Thu Apr 02, 2009 11:28 am- Forum: Problem Solving
- Topic: ps
- Replies: 6
- Views: 3039
I think the answer is B this is how i solve it though D = RT After 3 hours there would be a distance of 18 miles between the two cyclist Distance covered by first cyclist D = 6*3 = 18 The difference in speeds at which the two are cycling is 4 mph Therefore we assume Second cyclist has to cover a dis...
- by kaf
Wed Apr 01, 2009 4:40 pm- Forum: Problem Solving
- Topic: Diff. Avg Speeds
- Replies: 3
- Views: 1336