Paddy's Unfair Coin

Discrete Mathematics Level 1

Paddy is flipping a weighted coin, which displays heads with a probability of \( \frac {1}{4} \). What is the expected number of coin flips he would need in order to get his first head?

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Paddy's Unfair Coin

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100 Day Summer Challenge

Paddy's Unfair Coin

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.

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

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

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

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