Using it's concept, it is found that there is a 0.79 = 79% probability that he or she is content with the vacation allowance.
A probability is given by the number of desired outcomes divided by the number of total outcomes.
In this problem, 500 - 105 = 395 out of 500 employees are content with the vacation allowance, hence:
p = 395/500 = 0.79.
There is a 0.79 = 79% probability that he or she is content with the vacation allowance.
More can be learned about probabilities at https://brainly.com/question/14398287