387.One Extra Coin
★★★classical probabilityCh. 2 — Axiomatic and Conditional Probability444+ Problems in Probability
Emilia has fair coins and Ron has fair coins. Both flip all of their coins. What is the probability that Emilia flips strictly more heads than Ron?
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Set Emilia's last coin aside and use the symmetry between "more heads" and "more tails" on the rest.
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