11. Find the equation of the common tangent in 1st quadrant to the circle $x ^ { 2 } + y ^ { 2 } = 16$ and the ellipse $x ^ { 2 } / 25 + y ^ { 2 } / 4 = 1$. Also find the length of the intercept of the tangent between the coordinate axes.
A six faced fair dice is thrown until 1 shows. The probability that 1 comes at an even numbered trial is
11. Find the equation of the common tangent in 1st quadrant to the circle $x ^ { 2 } + y ^ { 2 } = 16$ and the ellipse $x ^ { 2 } / 25 + y ^ { 2 } / 4 = 1$. Also find the length of the intercept of the tangent between the coordinate axes.\\