SOLUTION: Find the probability that at least one of the four salmon is successful. The probability tat a salmon swims successfully through a dam is 0.85.

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Question 867601: Find the probability that at least one of the four salmon is successful.
The probability tat a salmon swims successfully through a dam is 0.85.
Answer by jim_thompson5910(35256) About Me  (Show Source):
You can put this solution on YOUR website!
The probability of not making it through is 1-0.85 = 0.15


So the probability that all 4 fail is (0.15)^4 = 0.00050625


That means the probability of at least one making it is 1 - 0.00050625 = 0.99949375


This works because P(All 4 failing) + P(At least one of the four succeed) = 1