If the chance that team X will not win the championship is 75% and the chance that team Y will not win the championship is 50%, what is the probability that either team X or team Y wins the championship?

Answer Choices

Correct answer marked below

25%

50%

62.5%

75%

Correct

80%

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Explanation

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Official Explanation

Official

The probability that team X will NOT win the championship is 75%, which means that the probability that team X WILL win the championship is 1 - 0.75 = 0.25. The probability that team Y will NOT win the championship is 50%, so the probability that team Y WILL win the championship is 1 - 0.5 = 0.5. To find the…

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Comments

AryanApr 27, 2024

Any shortcuts for solving this faster?

PrabalOct 20, 2024

Thank you very much!

What this question tests

What it tests

Your ability to compute probabilities of single and compound events, including 'at least one' questions.

Common trap

Forgetting to use the complement for 'at least one', or treating dependent events as independent.