For k = 1, 2, 3 the box B_K contains k red balls and (k + 1) white balls. Let P(B₁) = 1/2, P(B₂) = 1/3 and P(B₃) =1/6. A box is selected at random and a hall is drawn from it.If a red ball is drawn, Then the probability that it has come from box B₂, is

The equation to the locus of point of intersection of the line y-mx=√(4m²+3), my+x = √(4+3m²) is

Three persons A, B, C in order toss a die. The persons who first throws 1 or 2wins.The ratio of the probabilities of their success is

The value of k if (1,2), (k,-1) are conjugate points with respect to the ellipse 2x²+3y²=6 is

At a selection, the probability of selection of A is 1/7 and that of B is 1/5.The probability that both of them would not be selected is

The eccentricity of the ellipse 25x²+9y²-150x-90y+225=0 is

In a town 40% people red Enadu, 25% people read jyothi and 15% people read both. A person is chosen at random from the town. The probability that the person chosen read Enadu but not read jyothi is

6 boys and 4 girls sit around a round table at random. The probability that the no two girls sit together is

100 tickets are numbered as 00, 01, 02,...,09, 10, 11,...99. When a ticket is drawn at random from them and if A is the event of getting 9 as the sum of the numbers on the ticket, then P(A)=

A bag contains 5 red, 3 black balls and another bag contains 4 red and 5 black balls. One of the bags is chosen at random and a draw of two balls is made from it. The chance that one id red and the other is black is