If everyone has hobbies,

53 + 72 = 125

/kloc-above 0/00?

So, if one has two hobbies,

That is 125- 1 = 124.

Well, if 25 people have two hobbies, that is.

53 + 72 - 25 = 100

iushi 1

Exactly 100 people

At this time, everyone has one or two hobbies.

If someone has no hobbies,

Then there must be more people with two hobbies.

So, the answer is 25.