Half of all marriages, which include people who have been married multiple times. For example, if you have 5 married couples, 4 are on their first marriage and the last couple is on their 6th marriage, then on average 50% of the marriages in this scenario failed. But it doesn't apply to everyone in the same way. Some people even remarry the same person.
The median is much lower.
Compared to the other Uber wealthy, he at least seems to have some sort of a code of ethics from what i can see, which is obviously limited. He's still in it to make money (obviously), but his actions seem to suggest that he won't go to the extreme of hurting everyone else just for money.
I started liking Mark more when he opened cost plus drugs. It's a pretty decent endeavor to try to reduce pharmaceutical costs for the consumer