Expected number of randomly tied strings

Question: You have a bag with 'N' strings in it. You randomly grab two ends and tie them together until there are no more loose ends.

In the end, what is the expected number of loops (strings tied to their own end)?

Riddle Discussion

Similar Riddles

???? (medium)

Question: What can be broken but never forgotten?

Can you ? (medium)

Question: If 4+5=24 7+2=21 9+6=63 6+7=?

Question: During what month do people sleep the least?

Leap Year (medium)

Question: Leap Year is every 4 years. True or False ?

Question: When is 99 more than 100?