An experiment succeeds twice as often as it fails. The probability of at least 5 successes in the six trials of this experiment is :

Question

$\begin{array}{1 1}(1)\; \frac{240}{729} \\ (2)\; \frac{192}{729} \\ (3)\; \frac{256}{729} \\ (4)\; \frac{496}{729} \end{array}$