Answer:
84%
Step-by-step explanation:
The probability that the selected player is a football player, P(F)=19%
The probability that the selected player is a basketball player, P(B)=79%
The probability that the selected player play both football and basketball,

We want to determine the probability that a randomly chosen athlete is either a football player or a basketball player, 
In probability theory

The probability that a randomly chosen athlete is either a football player or a basketball player is 84%.