The probability that Rhoda will hit a target is $\frac{4}{5}.$ The probability that Jack will hit the same target is $\frac{3}{4}$. If each of them fires once, find the probability that the target will be hit by only one of them is

Question

$\begin{array}{1 1} (a)\;\frac{7}{20} \\ (b)\; \frac{1}{4} \\ (c)\; \frac{3}{5} \\ (d)\; \frac{4}{20} \end{array}$