Correct. The number of 2-card combinations with a Heart and a Diamond is $\displaystyle{13}\cdot{13}={169}\usepackage{cmbright}\Huge\$ . Since the total number of 2-card combinations is $\displaystyle\frac{{{52}}}{{{502}}}={1326}\usepackage{cmbright}\Huge\$ , the answer is $\displaystyle\frac{{169}}{{1326}}=\frac{{13}}{{102}}\usepackage{cmbright}\Huge\$ .