1. Find the probability that a normal standard variable is less than or equal 0.
2. Given a normal distribution with = 3 and = 0.5, find the probability that X assumes
a value less than or equal 2.3.
9 friends decide to “go for a drink” after an exam. What is the probability that the waitress will refuse to serve alcoholic beverages to only 2 minors if she randomly checks the IDs of 5 students from among 9 students of which 4 are not of legal age?
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