Official Quant thread for CAT 2013

MBA CAT 2024
4301
@ScareCrow28 Source batao na :mg:
4302
@ayushnasa said:
@ScareCrow28 Source batao na
haan batao.. acha practise hoga.. drop the link
4303
@rachit_28 said:
Find the coefficient of x^r in {1/(1-x)*(3-x)}@ScareCrow28 tumne Probability ke itne saare questions daale ki sab bhag gaye, 2-4 kuch aur daalo, tab rang jamega
shall i answer? :P
4304
@wovfactorAPS said:
shall i answer?
jarur aap hi ne to sikhaye hai :P
4305

PM me your ID..I will send you the attachments

4306
@rachit_28 ans to btao?? (1-(1/3)^(r+1))/2
4307
@surajsrivastav said:
Mukesh, Suresh, and Diensh travel form Delhi to Mathura to attend JanmasthmiUtsav. They have a bike which can carry only two rides at a time as per traffic rules. Bike can be driven only by Mukesh. Mathura is 300km form Delhi. All of them can walk at 15km/hr. All of them start their journey from Delhi simultaneously and are required to reach Mathura at the same time. If the speed of bike is 60km/hr then what is the shortest possible time in which all there can each Mathura at the same time.
65/7
4308
If a not = n*pie and tan a is the GM of sin a and cos a, determine the square of the expression
2 창€“ 4 sin^2 a + 3 sin^4 a 창€“ sin^6 a.
1) 1
2) 4
3) 1/4
4) NOT
@krum bhai
4309
@krum said:
a "not" kya hai?
a is not equal to n*pie ..not equal to kaise bnau..smjh ni ara
4310
@krum said:
1/4 hai kya ?
nai bhai.. :(
4311
@ScareCrow28 said:
If a not = n*pie and tan a is the GM of sin a and cos a, determine the square of the expression2 €“ 4 sin^2 a + 3 sin^4 a €“ sin^6 a.1) 12) 43) 1/44) NOT@krum bhai
NOT?
4312
@SarayuSheshadri said:
NOT?
Nope
4313
@ScareCrow28 said:
nai bhai..

tan^2 a=sin a*cos a
=>sin a = cos^3 a

2 창€“ 4 sin^2 a + 3 sin^4 a 창€“ sin^6 a.
=>2-3sin^2a+3sin^4a-cos^6a-sin^6a
=>2-3sin^2a*cos^2a-(1-3cos^2a*sin^2a)
=>1

so 1^2=1

@ScareCrow28
4314
The square root of the harmonic mean of the roots of the equation
(5+root2)x^2 - (4+root5)x + 8+2root5 = 0 is
1) +-3
2) +-4
3) root2
4) NOT
4315
@ScareCrow28 said:
If a not = n*pie and tan a is the GM of sin a and cos a, determine the square of the expression2 €“ 4 sin^2 a + 3 sin^4 a €“ sin^6 a.1) 12) 43) 1/44) NOT@krum bhai
4?
4316
@mailtoankit said:
4?
naah.. ab to saare options boldie sabne except the answer option
4317
@ScareCrow28 said:
The square root of the harmonic mean of the roots of the equation(5+root2)x^2 - (4+root5)x + 8+2root5 = 0 is1) +-32) +-43) root24) NOT
+-2 ,not??
4318
@mailtoankit said:
+-2 ,not??
4319
@ScareCrow28 said:
The square root of the harmonic mean of the roots of the equation(5+root2)x^2 - (4+root5)x + 8+2root5 = 0 is1) +-32) +-43) root24) NOT
2ab/(a+b)
=>2(8+2root5)/(4+root5)
=>2(8+2root5)(4-root5)/9
=>4

so NOT

p:s - pichle wale ka 1 hai na?
4320
@krum said:
tan^2 a=sin a*cos a=>sin a = cos^3 a2 €“ 4 sin^2 a + 3 sin^4 a €“ sin^6 a.=>2-3sin^2a+3sin^4a-cos^6a-sin^6a=>2-3sin^2a*cos^2a-(1-3cos^2a*sin^2a)=>1so 1^2=1@ScareCrow28
BINGO!! Ekdum Correctum.. kya baatam!