Step 1

The probability of an event are given,

The probability of the event 2 to \(\displaystyle{7}={\frac{{{2}}}{{{2}+{7}}}}\)

Step 2

\(\displaystyle={\frac{{{2}}}{{{9}}}}\)

Thus, the probability of event is \(\displaystyle{\frac{{{2}}}{{{9}}}}\)

The probability of an event are given,

The probability of the event 2 to \(\displaystyle{7}={\frac{{{2}}}{{{2}+{7}}}}\)

Step 2

\(\displaystyle={\frac{{{2}}}{{{9}}}}\)

Thus, the probability of event is \(\displaystyle{\frac{{{2}}}{{{9}}}}\)