Official Quant thread for CAT 2013

MBA CAT 2024
26548
@albiesriram said:


@albiesriram said:

y intercept=-2/3
(0,2/3)
x^2/6 -4x/3 +2/3 = y
x^/6-4x/3+2/3=0
x^2-8x+4=0
focus =r1+r2/2=4
x=4 y=16/6 - 16/3+2/3 = 16-32+4/6=-2
(4,-2)and(0,2/3)
y+2=2/3+2/-4 (x-4)
y+2=-2/3 (x-4)
3y+6=-2x+8
2x+3y=2

26549
@iLoveTorres said:
553 adds up to 13.. if we go by your logic 13 can be further simplified to 4. its not a digit sum question
that means Q is saying any combination other than 13 as sum
26550
@Subhashdec2 said:

(4,-2)and(0,2/3)
isnt it (4, -1/2)?
26551
@vbhvgupta said:
that means Q is saying any combination other than 13 as sum
yeah.. warna toh matlab hi nahi banta question ka if they have asked for digit sum with sum=13.
26552

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

26553
@albiesriram said:
isnt it (4, -1/2)?
no man u put x=4 u will get y=-2
26554
@vbhvgupta said:
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
6
26555
@vbhvgupta said:
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
2.5rs
26556

Q 50

26557
@Buck.up said:
6
@iLoveTorres said:
2.5rs
dont have OA but it is not 6
26558
@vbhvgupta said:
Q 50
bhai yeh wala question aapne pehle bhi post kiya hua hai.. i guess the answer is 28.5% if my memory is good
26559

I am not sure then..
Well try this. re write the equations in std form,

open upward parabola shifted downwards by two units,

(x-4)^2 = 6(y+2)

here, 6 = 4a and a = 3/2 => focal length from original origin(0,0).
But,
Now the the y is "shifted" actually by 2 downwards. hence
focus will be at ( 4, -1/2 ). rest is same i guess..
26560
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
26561
@vbhvgupta 7.2
Let cp be x, therefore initial sp=1.2x
now, 1.2x+1.2=1.4x
therefore x=6 and initial sp = 7.2
26562
@chhabrakaran29 said:
@vbhvgupta 7.2Let cp be x, therefore initial sp=1.2xnow, 1.2x+1.2=1.4xtherefore x=6 and initial sp = 7.2
he gains 40%, gaining 40% and making a profit of 40% are two different things
26563
@vbhvgupta said:
Q 39
What's the OA of this?

Team BV--Pratik Gauri
26564
@iLoveTorres gain in this question is profit. otherwise 2nd condition will make him go into loss if we follow gain is not profit.
26565
@chhabrakaran29 said:
@iLoveTorresgain in this question is profit. otherwise 2nd condition will make him go into loss if we follow gain is not profit.
how would he go in loss.. if i am selling an article for 10 rupees and making a profit of 20 percent. if i increase the price by rs 1.2 i would gain something and not lose something. agar mera yeh concept hi galat hai toh mujhe sahi kar do
26566
@vbhvgupta said:
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
@scrabbler @bodhi_vriksha Sir, kindly solve this question as there is ambiguity in the answers we are getting
26567

bhai if you say gain is not profit then according to you he will get 40% of the cost price..which is an obvious loss..and that is why gain is profit..