* PS from centre s test PAper

[poonamchiK]

Last yr department store Xhad a sales total for Dec that was 4 times the average of the monthly sales totals for Jan to Nov. The sales total for dec was what fraction of the sales total for the year?

a. 1/4
b. 4/15
c. 1/3
d 4/11
e 4/5

thx i dnt know how to o this

ans : b

Q. A rabbit on a controlled diet is fed daily 300g of a mixture of 2 foods - Xand Y.
Food x contains 10% proteins and food Y contains 15% proteins. If th rabbits' diet provides exactly 38g of proteins daily, how many grams of food X is in the mixture?

100
140
150
160
200

i dnt understand how t fo this...

Q. A company that ships boxes to a total of 12 distribution centres uses colr coding to identify each centre. If either a single color or a pair of 2 different colors is chosen to represent each centre and if each centre is uniquely represented by tha choice of one or two colors, whatis the minimum no. of colors needed for the coding?
(Assume that the order of colors in a pair does not matter)

4
5
6
12
24

No clue how to do it. I chose 12. its wrong

A rectangular circuit board is designed to have width w, perimetre p and area k square inches. Which of the following equations must be true.

a. w*2 + pw + k = 0
b. w*2 - pw + 2k = 0
c. 2w*2 + pw + 2k = 0
d. 2w*2 - pw - 2k = 0
e. 2w*2 - pw - 2k = 0

ans : d

pls help

thx
poonam

[Ben Ku]

Hi,

Can you be more specific about the original author of the question? Which Center's test paper are you referring to? Without the specific source, we cannot respond to your question, and will have to delete your post.

Also, please read (and follow!) the forum guidelines before posting. Each post should only contain one problem.


Thanks,

[abheyjit.dadwal]

1.
Let the average of 11 months be = x
Therefore sales for december = 4x

This implies total sales = 15x (11x + 4x )

december/whole year = 4x/15x = 4/15

2.
10X/100 + 15(300-x)/100 = 38
X = 140

3.
5

4.

Width = W
length = (P - 2W)/2

now W * (P-2W)/2 = K

or 2W^2 - P + 2K = 0 ( You have a typo in one of your options )

[sarathsasikumar]

For 1 : If the average sales for one month is s, then for dec it will be 4s and the total for the year will be 11s + 4s = 15s. So ratio = 4s/15s.

For 2 : X+Y = 300
0.1 X + 0.15 Y = 38
==> X = 140, Y = 160

For 3 : nC1 + nC2 >=12...n works out to 5

For the last one, assume values w=2, l=4 So area = 8...now try putting these values in the choices to see which works.

[RonPurewal]

ok, so these are GMATPREP problems, and i'm feeling generous today, so here are some links:

a-rabbit-on-a-controlled-diet-is-fed-daily-300-grams-of-a-t7852.html

a-company-that-ships-boxes-to-a-total-of-12-t4717.html

post2399.html

you can do the last one by just making up a rectangle (say 3 long, 2 wide), taking the numbers you get (w=2 k=6 p=10), and just plugging them into the equations to see whether they work.

--

YOU MUST POST PROBLEMS IN SEPARATE THREADS. ONE THREAD PER PROBLEM.

poonam: if you post problems in this way again (more than one problem on one thread), we'll just delete the thread.
thanks.