alleryStart learning →The probability that a horse wins a race is 1/9. What is the probability that it loses?
AIt is 8/9
BIt is 1/8
CIt is 9/8
DIt is 1/9
Answer & Solution
Correct answer: A. It is 8/9
1. Losing is the complement of winning, since it collects every outcome that is not a win.
2. All the probabilities in a model add to 1, so winning and losing must add to 1.
3. Therefore the probability of losing is 1 - 1/9.
4. That is 9/9 - 1/9 = 8/9.
_Source: OpenStax Algebra and Trigonometry (CC BY 4.0), Ch 13 "Sequences, Probability and Counting Theory", section 13.7 Probability_
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