The probability of a appearing at least once in four independent repeated events is 0.59. What is the probability of a appearing in one test?

The probability of a appearing in one test is p
Then 1 - (1-p) ^ 4 = 0.59
(1-p)^4=0.41
1-p≈0.8
p≈0.2
The probability of a appearing in one test is about 0.2

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