Official Quant thread for CAT 2013

MBA CAT 2024
26568
@iLoveTorres said:

7.2? he is selling at 7.2, he had purchased at 6. if he increases sp to 8.4 his gain becomes 40pc
26569
@iLoveTorres said:
@scrabbler@bodhi_vriksha Sir, kindly solve this question as there is ambiguity in the answers we are getting
1.2CP+1.2=1.4CP

So, CP=6..
Initial SP=1.2CP=7.2 RS :)

Team BV--Pratik Gauri
26570
@iLoveTorres said:
18%?
What approach did you follow? I feel there is a tinge of ambiguity in this . This is an Arun Sharma ques :)


Team BV--Pratik Gauri
26571
@vbhvgupta: an orange seller make a profit of 20% by selling oranges at certain price. if he charges rs 1.2 higher per oranges he would gain 40%. Find the original price at which he sod an orange
ans: 7.2??
1.2CP+1.2=1.4CP
CP=6, SP=7.2
26572

Hi there. Someone please help me out with this question from pnc:

A party is arranged for 2M people along two sides of a long table with M chairs on each side. R men wish to sit on one particular side and S on the other. In how many ways they can be seated?

26573

2* m C r * m C s ?

26574
@bodhi_vriksha said:
What approach did you follow? I feel there is a tinge of ambiguity in this . This is an Arun Sharma ques Team BV--Pratik Gauri
sir suppose the cost price is 10/pc and i have to make a profit of 20% my selling price should be 12/pc. Now if i increase the price by 1.2 i.e make it 13.2/pc i should gain 40% on my SP(right?) but if you see i am gaining only 10% so to gain 40% i need to reduce my SP 4 times i.e 3/pc.

Now my CP will be 2.5/pc SP will be 3/pc New SP will be 4.2/pc
26575
@imrover said:
Hi there. Someone please help me out with this question from pnc:A party is arranged for 2M people along two sides of a long table with M chairs on each side. R men wish to sit on one particular side and S on the other. In how many ways they can be seated?
M^2 * (M -2)!
26576
http://www.pagalguy.com/forums/quantitative-ability-and-di/official-quant-thread-c-t-88456/p-3611604/r-4890972?page=1344 i was talking about ques 39 on this in which u wrote the ans as 18 % .. lol :p

Team BV--Pratik Gauri
26577
@iLoveTorres said:
@scrabbler@bodhi_vriksha Sir, kindly solve this question as there is ambiguity in the answers we are getting
its 7.2 !!!
26578
@Dexian albiesriram the answer given along the question is { MPR*MPS*(2M-R-S)! }
could you please elaborate on your approach.
26579
@imrover said:
Hi there. Someone please help me out with this question from pnc:A party is arranged for 2M people along two sides of a long table with M chairs on each side. R men wish to sit on one particular side and S on the other. In how many ways they can be seated?

[2M-(R+S)]C[M-R] * (M!)^2 shayad...

First distributing the remaining people, then arranging each side ke log separately.

regards
scrabbler
26580
@imrover said:
@Dexianalbiesriramthe answer given along the question is { MPR*MPS*(2M-R-S)! } could you please elaborate on your approach.
are i thought R and S are different individuals.........
26581
@imrover : Hi there. Someone please help me out with this question from pnc:

A party is arranged for 2M people along two sides of a long table with M chairs on each side. R men wish to sit on one particular side and S on the other. In how many ways they can be seated?

ans: [(MCR * M!) * (MCS * M!)* (2M-R-S)!] ??
26582
@imrover said:
@Dexianalbiesriramthe answer given along the question is { MPR*MPS*(2M-R-S)! } could you please elaborate on your approach.
see we have 2M people .. out of this , r and s are particular about their seating arrangement.. so we are left with 2m-r-s people .. we choose M-r people out of this for one side .. once this is done other side would automatically be choosen .. so C(2M-R-S,M-R).. we can also arrange this in M!^2 ways(both sides are arranged ).. so c(2m-r-s,m-r)*m!^2 ways ..hope u got this :)

Team BV--Pratik Gauri
26583
@iLoveTorres said:
sir suppose the cost price is 10/pc and i have to make a profit of 20% my selling price should be 12/pc. Now if i increase the price by 1.2 i.e make it 13.2/pc i should gain 40% on my SP(right?) but if you see i am gaining only 10% so to gain 40% i need to reduce my SP 4 times i.e 3/pc.Now my CP will be 2.5/pc SP will be 3/pc New SP will be 4.2/pc
Not this question .. i was referring to the question in which u gave 18% as the answer .. q39 on pg 1344..there is slight ambiguity in that ques ..

Team BV--Pratik Gauri
26584
@scrabbler @bodhi_vriksha @empyrean19 got it. thanks all :)
26585
@bodhi_vriksha said:
http://www.pagalguy.com/forums/quantitative-ability-and-di/official-quant-thread-c-t-88456/p-3611604/r-4890972?page=1344 i was talking about ques 39 on this in which u wrote the ans as 18 % .. lol Team BV--Pratik Gauri
C invested 3000
B invested 3000*3/4=2250
A invested 3000*.5=1500
Total investment= 6750
Profit is 25% i.e 6750*.25= 1687.5
Now A expects a return of 10% on his investment i.e 150
B expects a return of 15% on his investment i.e 2250*.15= 337.5 + 8% of the total profit i.e 1687.5*.08=135 hence B gets 472.5.

Jus now read the last line of the question that the profit is divided in the ratio of their investment. So i guess my answer is wrong.

Still to complete my answer the difference in profit% is 322.5/1687.5=19.11
26586
@RRD2 said:
The equation x^8 €“ 3abx + a2 = 0 has one root that is greater than or equal to 3. If a is positive, b cannot be:-a) 25 b)22 c)21 d) 18 e)15
how to solve this ? I thought 3 options are multiples of 3 but there are two non multiples , otherwise I would have gone for one of them
26587
@iLoveTorres said:
@scrabbler@bodhi_vriksha Sir, kindly solve this question as there is ambiguity in the answers we are getting
it should b 7.2