What is the theoretical probability of a coin landing tails up?
2 answers:
Answer:
The probability that a fair coin lands tail up is 1/2, which is equal to 0.5.
Step-by-step explanation:
There are two possible outcomes when a coin is flipped (saving for the case when the coin lands on its side.)
- The coin lands head-up;
- The coin lands tail-up.
If the coin is fair, the two outcomes should be equally likely. In that case, apply the following formula:
.
Credit for the phrasing of this probability formula goes to the Khan Academy article "Probability: the basics".
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