Are you an addicted Facebook fan of Brilliant?
Discrete Mathematics
Level
2
2. Are you addicted to Brilliant?
In a survey, 75% of people said YES to the first question, and 85% of people said YES to the second question. Given that only 5% of people said NO to both questions, what percent of people said YES to both questions?
Calvin edit: Remember to like us on Facebook!
by
Chung Kevin