Official Quant thread for CAT 2013

@scrabbler said:
The "berry solid" has not changed. It was 1% of earlier stuff and has now become 2% of the new stuff so the new volume must be 1/2 the earlier.regardsscrabbler
or to put it in simpler terms water has evaporated :P
@iLoveTorres said:
or to put it in simpler terms water has evaporated
Yes but looking at water it becomes painful na 😃 Looking at "that which has remained same" gives an answer in about 5 seconds...ab usko kuch naam dena tha to berry solid bol diya :splat:

regards
scrabbler

Q 39

@scrabbler said:
Yes but looking at water it becomes painful na Looking at "that which has remained same" gives an answer in about 5 seconds...ab usko kuch naam dena tha to berry solid bol diya regardsscrabbler
better wala naam was "MATTER"

Sorry for spamming

Out of "X" students, 22.1875% students are bad.If the bad students are "Y" in number,what is the min value of X+Y?

@vbhvgupta said:
Q 39
18%?
@maroof10 said:
Out of "X" students, 22.1875% students are bad.If the bad students are "Y" in number,what is the min value of X+Y?
Edit: 391? 71, 320

regards
scrabbler

@maroof10 said:
Out of "X" students, 22.1875% students are bad.If the bad students are "Y" in number,what is the min value of X+Y?
22.1875 = 355/16
Hence, Y = 71/320 X

So, X = 320 and Y = 71

X+Y = 391
@scrabbler its 391....approach plz
@ScareCrow28 thanks
@ChirpiBird said:
sir, i dont remember much of differentiation. Please post that method too.#farzi Engineer!
The differentiation method has already been posted on the previous page . Check it . I am feeling very lazy to type it again 😃

Team BV--Pratik Gauri
@maroof10 said:
Out of "X" students, 22.1875% students are bad.If the bad students are "Y" in number,what is the min value of X+Y?
391?
@maroof10 said:
@ScareCrow28 thanks
You may like the post for thanking instead of explicitly mentioning 😃 # No-offence
Mods don't like spamming!
@maroof10 said:
@scrabbler its 391....approach plz
18.75 *4 =75...so .1875 = 1/4th of .75 = 3/16...so 22 and 3/16 % = 355/16 % = 355 / 1600 = 71/320...hence.

regards
scrabbler

the profit earned when an article is sold at 800 is 20 times the loss incurred when it is sold for 275. At what price should the article be sold if it is desired to make a profit of 25%

@vbhvgupta said:
the profit earned when an article is sold at 800 is 20 times the loss incurred when it is sold for 275. At what price should the article be sold if it is desired to make a profit of 25%
375
Approach:
loss is 1 part and profit is 20*1=20 parts. so divide the difference 800-275=525 into 21 parts. you will get 25. So the CP is 300. now you want 25% profit so 300/4=75+300=375 should be the SP
@maroof10 said:
Out of "X" students, 22.1875% students are bad.If the bad students are "Y" in number,what is the min value of X+Y?
y=0.221875
221875=5^5*71
to make y an integer,multiply by 2^5*10
therefor x=320,y=71
x+y=391
@vbhvgupta
cp = 300
answer = 375

take difference of the two SPs and divide into 21 parts...you will get cp = 300
@iLoveTorres said:
375
approach

Q 45