Official Quant thread for CAT 2013

MBA CAT 2024
4541
@krum said:
root2/2
@catter2011 said:
A) rt(3)/3 ?
bhai logon apna approach batana .....
4542
@maddy2807 said:
@catter2011 check post no. 4580.
explain -10C2 in numerator pls..
4543
@catter2011 said:
explain -10C2 in numerator pls..
total no of ways in which two person can do a handshake= 20C2= 190
No of ways in which indian wives do handshake with American husband= 10C2
No of ways in which a wife do a handshake with her husband= 10 [ as their is 10 couples]

Required prob= (20C2 - 10C2 - 10)/20C2
4544
A cyclic quadrilateral of maximum area is drawn inside a circle and is painted blue. Find the percentage of area not painted.
A. 36.36%
B. 44.44%
C. 57.14%
D. 48.13 %

4545
@maddy2807 said:
total no of ways in which two person can do a handshake= 20C2= 190No of ways in which indian wives do handshake with American husband= 10C2No of ways in which a wife do a handshake with her husband= 10 [ as their is 10 couples]Required prob= (20C2 - 10C2 - 10)/20C2
2) kaise 10C2 ? 5IW and 5AH, 10C2 includes american husbands handshaking and indian wifes handshaking among themselves tooo
4546
@maddy2807 said:
A cyclic quadrilateral of maximum area is drawn inside a circle and is painted blue. Find the percentage of area not painted.A. 36.36% B. 44.44% C. 57.14% D. 48.13 %
36.36% ?
4547
@maddy2807 said:
A cyclic quadrilateral of maximum area is drawn inside a circle and is painted blue. Find the percentage of area not painted.A. 36.36% B. 44.44% C. 57.14% D. 48.13 %
(4*pi-8)/4*pi*100
=36.33%

4548
@maddy2807 said:
A cyclic quadrilateral of maximum area is drawn inside a circle and is painted blue. Find the percentage of area not painted.A. 36.36% B. 44.44% C. 57.14% D. 48.13 %
is it A??????
4549
@maddy2807 said:
A cyclic quadrilateral of maximum area is drawn inside a circle and is painted blue. Find the percentage of area not painted.A. 36.36% B. 44.44% C. 57.14% D. 48.13 %
a?
4550
@maddy2807 said:
A cyclic quadrilateral of maximum area is drawn inside a circle and is painted blue. Find the percentage of area not painted.A. 36.36% B. 44.44% C. 57.14% D. 48.13 %
36.36 % ?

(Circle - Square)/Circle
4551
@PSub said:
B?pi(a(root2)/2)^2-a^2=> a^2*4/7
option A
i guess u made calc mistake sumwhere
4552
@maddy2807 yesssssss 400/11 = 36.36 aa rha h
4553
@amresh_maverick but what
@catter2011 is saying makes sense... dont u think. as such it is not mentioned explicitly anywhere.
4554
In the middle of a circular park of radius 2r units, a circular hole of radius r units has been dug. The mud extracted from the hole has been spread uniformly over one third of the rest of the park, to make an elevated platform around the hole. This has led to an increase of 5 units in initial depth of the hole. Find the percentage increase in depth of the hole.
A. 100%
B. 200%
C. 66.66%
D. 33.33%
E. None of these

4555
@maddy2807 said:
@amresh_maverick but what @catter2011 is saying makes sense... dont u think. as such it is not mentioned explicitly anywhere.
1 mahine pehle 2 page tak sir patka hai ispe :mg:
4556
@amresh_maverick said:
27/38Indian couples : H1W2 , H2W2 .. H5W5american ones :h1w1 , h2w2 ,....h3w3Total handshakes = 20C2 = 190Condition :case 1: wives and wives 10C2 =45case 2: husband and husbands ()10C2=45case 3: Indian husbands and American wives ()10C2 =45Total 45*3 = 135prob = 135/190 = 27/38
ur case 2 and case 3 .. have some commons which ur repeating while taking numerator..

@maddy2807 i warned you before
4557
@maddy2807 said:
In the middle of a circular park of radius 2r units, a circular hole of radius r units has been dug. The mud extracted from the hole has been spread uniformly over one third of the rest of the park, to make an elevated platform around the hole. This has led to an increase of 5 units in initial depth of the hole. Find the percentage increase in depth of the hole. A. 100% B. 200% C. 66.66% D. 33.33% E. None of these
A ?
4558
@krum said:
1 mahine pehle 2 page tak sir patka hai ispe
kuch solution nikala. ya fir aaj b chod de?
4559
@maddy2807 said:
@amresh_maverick but what @catter2011 is saying makes sense... dont u think. as such it is not mentioned explicitly anywhere.
yes no where it is mentioned that Indian wives cannot shake hands with each other or American husbands cannot shake hands with each other
4560
@catter2011 bhai tu to mere peeche hi padh jata hai ...