An unfair coin has a probability of 0.7 of landing on tails with each toss. If this coin is flipped 4 times, what is the probability that at least one of the flips results in tails?

Answer Choices

Correct answer marked below

0.0168

0.2401

0.5292

0.7599

0.9919

Correct

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Explanation

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Official Explanation

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To find the probability that at least one of the flips results in tails, we first calculate the probability that all flips are heads. The probability of heads is 0.3, so the probability…

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Comments

AbrahamMay 2, 2024

thank you very much!

HQAug 4, 2024

thanks

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.