Use the at least once rule to find the indicated probability…

Use the at least once rule to find the indicated probability. An unprepared student makes random guesses on all questions of her multiple choice test. If there are 16 questions and each question has 4 possible answers, what is the probability she will answer at least one question correctly?

Find the indicated probability.The following table show the…

Find the indicated probability.The following table show the results of a clinical trial for an allergy drug.  What is the probability that a randomly selected person either was given the allergy drug or did not improve? Round your answer to the nearest thousandth when necessary.

Find the indicated probability. Round your answer to 6 decim…

Find the indicated probability. Round your answer to 6 decimal places when necessary.In January in a certain city the unconditional probability of rain on any given day of the month is 0.400. But the probability of rain on a day that follows a rainy day is 0.600 and the probability of rain on a day following a nonrainy day is 0.250. Find the probability that January 1st and January 2nd are rainy and that January 3rd and 4th are not rainy given that December 31st was clear all day.