Given the data of the table, we must find the probability that a class attendee:
• A = is a non-member of the gym and is attending a barre class,
,
• or B = is a member of the gym and is attending a yoga class.
The total probability is the sum of the probabilities of each event:

The probability of event A is given by:

The probability of event B is given by:

So the total probability is:

Answer
The probability is 0.2378.