Assuming the tests are independent (different tests) the probability of passing each is .6.
The probability of failing all three is .4^3
so the probability of passing at least one is
1 - .4^3
The probability of an outstanding student pass a biology test is 60%. If he takes three test, which are the experimental results for each test?
My doubt is if I should consider the pass=.6 since the first event or when it mentions that the probability is .6 and he takes three test, it's means that at the end of the third event is only when the pass=.6. In this second approach I should presume that in the first 2 attempts, the student pass score is 100%. Which is the correct approach?
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