(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

In a certain high-risk group, the chance of a person having suffered a heart attack is 70%. If four persons are chosen from the group, find the probability that at least one will have had a heart attack.

2. Relevant equations

(work shown below) these would be dependent

3. The attempt at a solution

(.7)/(4) = 2.8

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# Statistics, probability help please !

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