In an experiment, it is found that the probability that a released bird will come back is \(\rm \dfrac {2}{5}\). It is also found that when a bird comes back, the probability that the bird will stay is \(\rm \dfrac {1}{3}\). In this experiment, what is the probability that a released bird will come back and fly away?
1
\(\rm \dfrac {4}{15}\)
2
\(\rm \dfrac {3}{8}\)
3
\(\rm \dfrac {2}{15}\)
4
\(\rm \dfrac {2}{5}\)