Find the probability that a normal standard variable is less than or

Problem 1   Problem 2  Problem 3 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 assumesa value less than or equal 2.3.Problem 49 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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