Skip to content
QuantReadySign In
#1153easyProbability

3 Heads 3 Tails III

Asked at:Susquehanna (SIG)
Part of:Probability & Counting → Expected ValueProbability & Counting → Coin FlippingProbability & Counting → Discrete Distributions

Alice and Bob are engaged in a coin-tossing game. Alice wins if three heads come up, while Bob wins if three tails are tossed. The heads and tails don't need to be in a row. How many tosses, on average, will it take to declare a winner?

Enter your answer rounded to 5 decimal places.

Loading interactive editor…