Recently Active Algebra Questions

if the prob of horse p winning a race is 1/ 4 and that of horse Q winning the race is 1/ 6 find the prob that none will win ...

a bag contains 5 black and 3 red balls a ball is taken out of the bag and is not returned then wat is the prob of drawing a red ball in the second draw if the ball in first draw is red please explain me the solution in detail ...

Just a simple question for all... if x and y are two complex roots of Zn=1 then what is the condition on "n" that Arg(x/y)=pi/2 has a possiblity? (n is an integer!) ...

consider seven digit numbers x1 x2 .... x7 ≠0 having the prop that x4 is the greatest digit and the digit to left and right of x4 are in decreasing order then total number of such numbers in which all the digits are distinc ...

a square matrix A is said to be an idempotent matrix if A2=A. now answer the following questions: 8.) if A is a non-singular idempotent matrix, then a) A=IN b) A=0 C) A+A'=0 D) none of these. [cont....] ...

Suppose we need to solve the equation x^{x^{x^{x^{.^{.^{.^{.}}}}}}}=2 The usual trick is to realize that the exponent of the bottom x is same the entire LHS, and so we get x^2=2\qquad \Rightarrow \ x=\sqrt{2} That is to say t ...

how to check if 144255 + 192255 is divisible by 49 or not ...

2 different non parallel lines meet the circle |z|=r in the points a,b and c,d respectively,Then the point of intersection of the lines z=(a-1+b-1-c-1-d-1)/(a-1b-1-c-1d-1) Is the above statement true or false??? Edit:non para ...

On a dice we have the following numbers written: 0,1,2,3,4,5. We throw this dice until the sum of the points that appeared is bigger than 12. Which sum has the highest probability that we can obtain from all the other's? ...

Rekha married Shivram and had 4 sons. Varsha married Ajoy and had 4 sons. Both the couples had divorce and after that Shivram married Varsha while Ajoy married Rekha. They too had 3 sons each from their wedlocks. How many sel ...

In answering a question on a multiple choice test, a student either knows the answer or guesses. Let n3/4 be the probability that he knows the answer and 1/4be the probability that he guesses. Assuming that a student who gues ...

Find the last 2 digits of 2999 ...

probability that A speaks truth is 4/5. A coin is tossed. A reports that a head appears. wat will be the probability if actually there was a head?????????????????????????????????????????????????????? i want solution ...

√[1+(1/12)+(1/22)] +√[1+(1/22)+(1/32)]+ .....................+√[1+(1/20072)+(1/20082)] =? a) 2008-(1/2008) b)2009-(1/2008) c)2008-(1/2009) d)2009-(1/2009) ...

\sum_{1\ll i }^{}{}\sum_{<j<k}^{}{}\sum_{\ll n}^{}{(x_{i}+x_{j}+x_{k}})=\lambda (\sum_{m=1}^{n}{x_{m}}) Determine λ ...

There are n≥4 points situated on a plane such that no two of the lines joining them are parallel and no three of the lines joining them are concurrent except at the given points. Find the number of points of intersection, o ...

5 Indian and 5 American couples meet at a party and shake hands. If no wife shakes hands with her husband and no Indian wife shakes hands with a male then find the number of handshakes that take place in the party. Ans. 135 ...

Statement 1:- c2c3c4........cn < ( nn 2(n - 1)(n - 2) ) / (n!)2 cr = ncr Because Statement 2 :- For positive quantities AM ≥ GM. ...

Q if p=(x2-x1)2+(2√x2-x1-2)2 , x1,x2 ε R and x2 > 0 , then find minimum value of p ?? ...

Pick 2 random numbers m and n between 0 and 1. What is the probability that the closest integer to (m/n) is even? ...

find the sum of all natural numbers n such that 1000 ≤ n ≤ 4000, that can be made with the digits 0, 1, 2, 3, 4 if repetition of digits in the same number is allowed. ...

Let z=1-2i. Find 1/z+2/z^2+3/z^3+... ...

wat is value of sin(log ii) iiii this power upto infinity = a + ib find them ....find b/a and a2 +b2 ...

1)Out of 2n+1 cards numbered successively, 3 cards are drawn. What is the probability tat the numbers on the card are in A.P? Ans: 3n/4n2-1 2) Each question in the eq ax2+ bx+c is obtained by tossing a Die. Find the probabili ...

Prove that x>y is true for all y<x ...

How many 1s are there in the result of 1 + 11 + 111 + ... + 11..111 (which is 2002 ones) ???? ...

\frac{r_{1} r_{2} r_{3}}\frac{{}r^{3}}{} the minimum value of this. may be easy but nice problem I thought.bahut easy that to maaf kardena ...

number of natural nos. less than and co prime with 11664 ? ...

i dunt know why i am getting wrong answer for so easy question so i will post my answetr and the co0rrect answer also 7 cards are drawn at random from a pack of 52 cards what is probability that 3 red 4 black answer 325 /3915 ...

There are 9 books on the shelves A,B,C. We are searching for the probability of that there are 2 on A, 2 on B. If the books are same, what is the probability? If the books are different, what is the probability? ...