Statement 1 alone is not sufficient, as we don't know about other types of sessions. They could be strength training, swimming, Zumba, etc.
Statement 2 alone is sufficient because members who attend yoga are a subset of those who attend strength training.
For example, if 20 members attend yoga, those 20 also attend strength training. Now, as for strength training, it could be the case that these 20 are the only ones who attend, or it could be the case that there may be, say, 10 people who attend strength training but not yoga. In either case, the number of members attending yoga is less than or equal to one's attending strength training.
Hence, we can answer 'No' to the question asked.
Option B.
Bunuel
Out of 180 gym members, is the number of members who attend yoga sessions greater than the number who attend strength training sessions?
(1) Every member who attends yoga sessions also attends at least one other type of session.
(2) Every member who attends yoga sessions also attends strength training sessions.