False positives and negatives

Discrete Mathematics Level 1

Person "A" says the truth 60% of the time, and person "B" does so 90% of the time. In what percentage of cases are they likely to contradict each other in stating the same fact?

Excel in math and science

Master concepts by solving fun, challenging problems.

It's hard to learn from lectures and videos

Learn more effectively through short, conceptual quizzes.

Our wiki is made for math and science

Master advanced concepts through explanations, examples, and problems from the community.

Used and loved by 4 million people

Learn from a vibrant community of students and enthusiasts, including olympiad champions, researchers, and professionals.