Two dies are rolled. If both dices have six faces numbered 1, 2, 3, 5, 7 and 11, then the probability that the sum of the numbers on the top faces is less than or equal to 8 is :

If the fourth term in the expansion of $${(x + {x^{{{\log }_2}x}})^7}$$ is 4480, then the value of x where x$$\in$$N is equal to :

The system of equations kx + y + z = 1, x + ky + z = k and x + y + zk = k² has no solution if k is equal to :

Choose the incorrect statement about the two circles whose equations are given below :

x² + y² $$-$$ 10x $$-$$ 10y + 41 = 0 and

x² + y² $$-$$ 16x $$-$$ 10y + 80 = 0