Answer:

1. 83

2. 78

Step-by-step explanation:

If no member plays at least two sports, it means that each member plays only one sport. Therefore, the total number of members in the varsity club is:

25 + 30 + 28 = 83

So there are 83 members in the varsity club.

If 5 basketball players are also volleyball players, then the number of basketball players who are not volleyball players is:

25 - 5 = 20

Since no soccer player is also a volleyball or a basketball player, then the number of soccer players is:

28 - 0 = 28

Therefore, the total number of members in the club is:

20 + 30 + 28 = 78

So there are 78 members in the varsity club.