Messages posted by sharmadon

is it 2500/3? pls confirm..then i shall post my soln..

hey the answrs according to the solution given by Brilliant tutorials is:

1. A,B

2. C,D

3. A,B,D

4. A,C

and my friend ganesha..u can consider it as a system only wen u can confirm that they move together..please justify...

i am really very tensed about such kind of questions..pls somebody help........with proper solution..

yes its a circle..now pls post ur solutions...

tangents at the points (a cos(theta), a sin(theta) ), and (a cos(theta + pie /3), a sin(theta + pie/3) ) on a circle x^2+y^2= a^2 are drawn.then what is the locus of intersection of these tangents?

two blocks of masses m_a=2kg and m_b=4kg are kept on an inclined plane of inclination

= 37degree as shown.The coefficient of friction bw A and B is

₁ and bw B and surface is

₂. accelerations of blocks A and B are a₁ and a₂. then match the following.

column I column II

1.a₁=a₂A.₁= 0.3 and

₂ = 0

2.a₁

a₂ B ₁= 0.8 and

₂ = 0.8

3.if work done by friction on block B is zero,then C.₁= 0 and

₂ = 0.2

4.if net contact force on block A is normal force,then D.₁= 0.4 and

₂ = 0.8

yes the answer for the first one is i..hw abt the others??

1. if f_p(a) = ^p

_k=1 ( cos ka/p² + i sin ka/p² ). then what is _n

f_n(

) ?

2. if | z- i Re(z) | = | z- Im (z) |,then z lies on:

a. Re(z)=2

B. Im(z)=2

c. Re(z) + Im(z) = 2

D. none of these

3.if a is a complex constant such that az2 + z + conjugate(a) = 0 has real root then

a. a+conjugate(a) = 1

b. a+conjugate(a) = 0

c. a+conjugate(a) = -1

d.the absolute value of real roots is 1

4.what is the reflection of comlex no. 2-i / 3+ i in the straight line z(1+i) = conjugate(z) ( i - 1) ?

help me guys....

yeah..thnx for help..neway are u on orkut??

yeah..thnx for help..neway are u on orkut??

please give a generalised solution of such questions...

two blocks of masses m1 and m2 are kept on an inclined plane of inclination

as shown.The coefficient of friction bw A and B is

₁ and bw B and surface is

₂. accelerations of blocks A and B are a₁ and a₂. then for what values of

₁ and

₂ will a₁=a₂ and a₁

a₂ ??

hey himanshu...i got the point..

in case of favourable cases..then u have considered that there will be 14 cars in 21 places...but it has to be 22 places because one of his own,and the adjacent places..so its 25-3=22

hence the answer wud be 22C14 / 24C14 = 15/92

6 couples have been seated along a long table,males on one side and females on the other.

a. the probability that the birthdays of 6 males fall in exactly one calender month is 1/ 12^6

b. the probability that the birthdays of 6 males fall in exactly three calender months is 9900/ 12^6

c. if 4 persons are selected at random then the probability that 2 of them are male is 5/11

d. if 4 persons are selected at random then the probability that there is exactly one male and no two selected females are adjacent to each other is 17/165.

20 students have been seated along a long table, 10 on each side. 8 students are selected at random.then what is the probability that 4 students belong to one side and 4 to the other side but no two of them are adjacent to each other?

9 cards are drawn at random from a set of cards marked either 1,0 and -1.It is equally likely that any of the three numbers may be drawn. then what is the probabiltiy that the sum of the numbers drawn is zero?

please help me with the 1st question...

neway pls tell me ur method.may b we can sort it out together and check out...

a car is parked by an owner amongst 25 cars in a row, not at two extremes.on his return, he finds that exactly 15 places are still occupied.the probability that both neighbouring places are vacant is:

a. 15/92

b. 91/276

c. 151/253

ans a.

1. there are 6 diff pairs of gloves.if 8 gloves are selected at random then what is the probability that there are exactly 2 pairs??

2. 12 distinct balls are distributed among 3 different boxes.then what is the probability that first box contains 3 balls?

3. a six-faced die is biased such that it is twice to show an even no. when thrown. if it is thrown thrice then what is the probability that sum of the no. is even?

4.there is a group of 6 persons.they play a game in which each has to select a number from 1 to 4.the group wins if at least 5 of them have same selection of numbers, then what is the probability that the group wins?

5.what is the probability of selecting two squares of 1*1 house from a chess board with one side in common?

yes balganesh..the answer by u isnt correct...

Preparing for IIT-JEE ?

Arihant Revision Package for IIT JEE - Books, Practice Tests + Rank Predictor

@ INR 1,995/-

For Quick Info