A box contains 9 green and 7 yellow balls. Two balls are drawn in succession at random. What is the probability that one of them is green and the other is yellow?
1
\(\frac{{21}}{{40}}\)
2
\(\frac{7}{{15}}\)
3
\(\frac{{21}}{{80}}\)
4
\(\frac{9}{{16}}\)