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 was given a placebo or improved? Round your answer to the nearest thousandth when necessary.

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.

Find the indicated probability. Round your answer to 6 decimal places when necessary.Based on meteorological records, the probability that it will snow in a certain town on January 1st is 0.208. Find the probability that in a given year it will not snow on January 1st in that town.

Find the indicated probability. Round your answer to 6 decimal places when necessary.A fair die is rolled. What is the probability of rolling a 3 or a 4?

Find the indicated probability. Round your answer to 6 decimal places when necessary.A batch consists of 12 defective coils and 88 good ones. Find the probability of getting two good coils when two coils are randomly selected if the first selection is replaced before the second is made.

Find the indicated probability. Round your answer to 6 decimal places when necessary.When two balanced dice are rolled, there are 36 possible outcomes. Find the probability that either doubles are rolled or the sum of the dice is 10.

Find the indicated probability. Round your answer to 6 decimal places when necessary.A fair die is rolled. What is the probability of rolling a 3 or a 4?

Find the indicated probability. Round your answer to 6 decimal places when necessary.A batch consists of 12 defective coils and 88 good ones. Find the probability of getting two good coils when two coils are randomly selected if the first selection is replaced before the second is made.

Find the indicated probability. Round your answer to 6 decimal places when necessary.If you are dealt two cards successively (with replacement of the first) from a standard 52-card deck, find the probability of getting a heart on the first card and a diamond on the second.

Use the at least once rule to find the indicated probability. The probability of winning $20 in a particular lottery is 0.03. What is the probability that you will get at least one $20 winner if you buy 20 tickets?