If n positive integers are taken at random and multiplied together , the probability that the last digit of the product is 2,4,6 or 8 is

Five digit numbers can be formed from the digits 1,2,3,4,5. If one number is selected at random, the probability that it is an even number is

A bag contains four balls. Two balls are drawn and found them to be white. The probability that all the balls are white is

If 3 cards are drawn from a pack of cards, then the probability for the cards to be a king, a queen and a jack is

If the probability that A and B will die with in a year are p and q respectively, then the probability that only one of them will be alive at the end of the year is

The eccentricity o the ellipse 9x²+16y²=576 is

A bag contain 6 white and 4 black balls. A fair die is rolled and a number of balls equal to that appearing on the die is chosen from the bag at random. The probability that all the balls selected are white is

The vertex and focus of a parabola are (2, 1), (1, -1). Then the equation of the tangent at the vertex is

If one ticket is randomly selected from, tickets numbered from 1to 30 then the probabilitythat the numbered on the tickets i a multiple of 5 or 7 is

If the point of intersection of kx+4y+2=0, x-3y+5=0 lies on 2x+7y-3=0, then k=