Find the indicated probability.You toss four coins and record the number of tails. You repeat this many times. The results are shown below.  Result Frequency 0 tails 3 1 tail 6 2 tails 14 3 tails 2 4 tails 1 Find the empirical probability of getting 4 tails. Round your answer to the nearest thousandth.

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.

Use the at least once rule to find the indicated probability. Find the probability of at least one 3 in 9 rolls of a fair die.

Find the indicated probability. Round your answer to 6 decimal places when necessary.Find the probability of selecting either a non-smoker or a woman when you select a person at random from a group composed of 20 female smokers, 50 male smokers, 40 female non-smokers, and 20 male non-smokers.

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. Round your answer to 6 decimal places when necessary.Three fair coins are tossed. Find the probability of getting the same thing on all three coins.

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 the allergy drug and improved? Round your answer to the nearest thousandth when necessary.

In recent years, most states have taken steps that promote sending young offenders to adult courts.

Juveniles convicted of murder can face life without parole.

What percent of male prison inmates are in a gang?