One ticket is selected at random from 50 tickets numbered 00, 01, 02, ... , 49. Then the probability that the sum of the digits on the selected ticket is 8, given that the product of these digits is zero, equals
At 80∘C, the vapour pressure of pure liquid 'A' is 520 mm Hg and that of pure liquid 'B' is 1000 mm Hg. If a mixture solution of 'A' and 'B' boils at 80∘C and 1 atm pressure, the amount of 'A' in the mixture is (1 atm = 760 mm Hg)
Relative permittivity and permeability of a material are ϵrandμr, respectively. Which of the following values of these quantities are allowed for a diamagnetic material ?
If the roots of the equation bx2+cx+a=0be imaginary, then for all real values of x, the expression 3b2x2+6bcx+2c2is