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A number of six digit numbers are written down at random.Probability that sum of digits is even is ...
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(1+cosx+isinx/1+cosx-isinx)n= ...
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All the spades are taken out froma a pack of cards.From these cards , cards are drawn one by one with out replacement till the ace of spades comes. the probability that the ace comes in the 4th draw is a)1/13 b)12/13 c)4/13 d ...
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wt r harmonic progressions? ...
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the sum of the integers from1to100 which are divisible by 2 or 5 (1)3000 (2)3010 (3)3150 (4)3050 ...
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IF P AND Q ARE +VE REAL NO'S AND P2+Q2=1 THEN THE MAX VALUE OF P+Q IS ...
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In a bolt factory machines A,B,C manufacture respectively 25%,35%,40% of the total bolts.Of their output 5,4,2 percent are respectively defective bolts.A bolt is drawn at random from the product. If the bolt drawn is found to ...
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a,b,c,p are in G.P then ax =by=cz=pμ thren x,y,z,μ are in A.P G.P H.P NONE ...
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A,B,C ARE IN H.P THN A/B+C , B/C+A C/A+B IN ...
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IF A,B,C,D AND P ARE DIFF REAL NO. SUCH THAT (A2+B2+C2)P2-2P(AB+BC+CD)+B2+C2+D2<=0 THEN A,B,C,D AREIN A.P G.P H.P NONE ...
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imagine that Sleeping Beauty volunteers to undergo the following experiment. On Sunday she is given a drug that sends her to sleep. A fair coin is then tossed just once in the course of the experiment to determine which exper ...
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Suppose you're on a game show and you're given the choice of three doors. Behind one door is a car; behind the others, goats [that is, booby prizes]. The car and the goats were placed randomly behind the doors before ...
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Values of 'x' satisfying x2logx=10x2 are ...
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At the banquet of a large conference 'n' people hang their coats on the coat-rack as they enter.At the end of the night,they leave in a drunken stupor,each one randomly putting on a coat without checking that it's ...
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If a,b,c,d are the roots of eq. x4+P1x3+P2x2+P3x+P4 =0,then (1+a2)(1+b2)(1+c2)(1+d2) = ? ...
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If a,b,c,d are the roots of the equation x4+P1x2+P2x2+P3x+P4=0 then (1+a2)(1+b2)(1+c2)(1+d2)= *Image* *Image* *Image* ...
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A bag contains n white balls & n red balls.Pairs of balls are drawn without replacement until the bag is empty.Find the probability that each pair consists of balls of diff colours. ...
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The least value of P for which the two arg(z) and /z - 2√3i / = P intersect is _? ...
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[7] Letters of the word ASSASSIN are arranged randomly and one is selected. Find the prob that in the selected word no two S are together. [7] ...
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derive the formulae for 12+22+32+......+n2 without using mathematical induction ...
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A and B plays a game of tennis. The situation of the game is as follows: if one scores two consecutive points after a deuce he wins; if loss of a point is followed by win of a point, it is deuce. The chance of a server to win ...
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Prove dis a/b+c + b/c+a + c/a+b ≥3/2......fr a,b,c>0 ...
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If A(z1),B(z2),C(z3) are the vertices of an equilateral triangle in the argand plane,then *Image* is _____ ...
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minimum value of (a+b+c+d)(1/a+1/b+1/c+1/d) is ...
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if α , β are roots of x2-px+q=0 ,then products of the roots ofquadratic equation whose roots are α2-β2 and α3-β3 is p(p2-q) show ...
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If a and b are chosen randomly from the set consisting of numbers 1,2,3,4,5,6 with replacement,find the probablity that lim (ax -bx+2/x)/2 =6 x--->0 ...
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suppose f(x)=x3+ax2+bx+c a,b,c are chosen respectively by throwing die three times.Find probability that f(x) is inc. function ans=5/12 ...
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wel ive cum across many questions of this type..........BUT......... wat is d exact procedure doin such questions??????????? -What is the number of positive integers which divide (2 ...
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A bag contains n white balls & n red balls.Pairs of balls are drawn without replacement until the bag is empty.Find the probability that each pair consists of one white ball & one red ball. ...
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In how many ways 5 different balls can be arranged into 3 different boxes so that no box remains empty? ...