$\begin{array}{1 1}(A)\;1-\large\frac{30C_5}{60C_5}\\(B)\;1-\large\frac{40C_5}{80C_5}\\(C)\;1-\large\frac{20C_5}{60C_5}\\(D)\;1-\large\frac{50C_5}{60C_5}\end{array} $
