Official Quant thread for CAT 2013


@nick_baba said:
At the end of year 2068, Shepard bought nine dozen goats. Henceforth, every year he added p% of the goats at the beginning of the year and sold q% of the goats at the end of the year where p>0 and q>0. If Shepard had nine dozen goats at the end of year 2072, after making the sales for that year, which of the following is true?[1] p = q [2] p [3] p > q [4] p = q/2 is ques ko karne ka koi sahi sa method batao...smthng sort of verbal n logical..n also had there been an option q=p/2..tab kya karte??
the guy will be buying and selling the same no of goats.

but while selling, the no of goats are more in quantity.. so the percentage of goats sold will be less than that of what he bought.
@nick_baba said:
yep frnz..ans is p>q ..but agar option q=p/2 bhi hota to ??
ho sakta hain.. but zaruri nahi hain ki hameesha sahi ho.
@Zedai bhai boss ne jyada paresha kiya hau hai kya??apka galat kaise aaya answere pahle
shocked
@bullseyes said:
wrong. correct
Please tag me whenever the correct solution to the question is posted
@sauravd2001 said:
@Zedai bhai boss ne jyada paresha kiya hau hai kya??apka galat kaise aaya answere pahle shocked
yaar.. mere baaju mein bhi baitha hain aab.


ek baar jhaanka bhi, tab excel sheet khol ke baith gaya..

ok puys ,, i'll call it a day now...will keep you bugged with more and more questions in coming days.....have a gr8 diwali..

@Zedai said:
yaar.. mere baaju mein bhi baitha hain aab.ek baar jhaanka bhi, tab excel sheet khol ke baith gaya..
bhai u are a zedi knight, playing with fire is second nature
@Zedai do salle ke
@Zedai said:
bhai, idhar mein apne concepts pe doubt karne laga tha!!
bhai, ab post kar sakte ho uska solution :D
@akansh_1 said:
bhai, ab post kar sakte ho uska solution
sorry bhai..

total cases: 8!

aur suppose team1: a,b,c,d,
team2: e,f,g,h

case1: team-1 wale top 4 aur team-2 wale next 4: arrangements : 4!*4!
(4!*4!, kyunki teams-1 wale apne mein arrange honge aur team-2 wale apne mein arrange honge)
cases2: team-2 wale top 4 aur team-1 wale next 4: arrangements : 4!*4!

so favorable cases: 2*4!*4!

prob: 2*4!*4!/8!
@krum said:
bhai u are a zedi knight, playing with fire is second nature
haha.. kaha yaar.. aag toh kahi aur hi lagi hui hain!
@sauravd2001 said:
@Zedai do salle ke
peeth peeche toh bohot deta hu bhai.
@Zedai said:
sorry bhai..total cases: 8!aur suppose team1: a,b,c,d,team2: e,f,g,hcase1: team-1 wale top 4 aur team-2 wale next 4: arrangements : 4!*4!(4!*4!, kyunki teams-1 wale apne mein arrange honge aur team-2 wale apne mein arrange honge)cases2: team-2 wale top 4 aur team-1 wale next 4: arrangements : 4!*4!so favorable cases: 2*4!*4!prob: 2*4!*4!/8!
One doubt. Why are we considering the arrangement also over here, why not selection only?

@akansh_1 said:
One doubt. Why are we considering the arrangement also over here, why not selection only?


idhar waise select karne ko kuch hain nahi... a,b,c,d in team1 aur e,f,g,h in team-2, dono hi within thoer respected team selected hi hain.. bass unhe arrange karna hain

aur agar hum selection ka case le lenge, i.e 4C4=1 while selecting a,b,c,d from team-1 and similarly from team-2, toh koi difference nahi rahega ..

a,b,c,d a,c,d,b ad,c,b d,a,c,b ... et al mein! infact, sabko ek hi case banega... 4C4=1


isilye arrangement lena padega to consider all these cases..
@bullseyes said:
In a factory three types of products A, B and C are manufactured. All workers employed in the factory are equally efficient. In one hour, 100 workers can produce 80 A's, 160 B's, 120 C's. In two hours, 75 workers can produce 125 A's, 140 B's and 180 C's. In three hours, 150 workers can produce 150 A's, 'X' B's and 540 C's. What is the value of 'X'?
80a+160b+120c=100z
125a+140b+180c=150z
150a+Xb+540c=450z

=>a=20b [from first 2 equations]

=>225a+(420-X)b=0 [from last 2 equations]


=>4500b=(X-420)b
=>X=4920
@Zedai : Thank you for explaining :)
@akansh_1 said:
@Zedai : Thank you for explaining
welcome
@soumitrabengeri said:
Please tag me whenever the correct solution to the question is posted
the answer is d
@bullseyes said:
the answer is d
Thanks..but which statement alone can answer the question?
@nick_baba said:
yep frnz..ans is p>q ..but agar option q=p/2 bhi hota to ??
consider a value 100.. if there is 20% inc. in 100 then to make value back to 100, dec. will be 16.66% which is not less then incremented % but not half of it..
half of the value will be only when the increment will be 100%.

@soumitrabengeri said:
Thanks..but which statement alone can answer the question?
A..
try to find answer.. if still not able to.. i will provide wd the answer.