If the likelihood of event a happening is 0.5 and the likelihood of event b happening is 0.2, what is the probability that event a occurs while event b does not, assuming that events a and b are independent?
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good question
Thank for sharing!
Independent means I can just multiply, right? So a happens and b doesn't... got it after a second.
yeah, just remember b NOT happening is the complement, not 0.2 itself
wait I almost picked 0.1 because I multiplied 0.5 and 0.2 lol. tricky wording with the 'b does not' part
same, the 'while b does not' is the whole thing here
thanks, this one was quick once you see it. 505-555 seems about right
why is 0.8 up there as an answer choice? that's just b not happening by itself
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.