Are you an addicted Facebook fan of Brilliant?

Discrete Mathematics Level 2

1. Are you a Facebook fan of Brilliant?
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!


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