Find the probability that at least 5 heads show up when a fair coin is tossed 7 times. Round your answer to two decimal places.

Richard has been given a 6-question multiple-choice quiz in his history class. Each question has three answers, of which only one is correct. Since Richard has not attended the class recently, he doesn't know any of the answers. Assuming that Richard guesses on all 6 questions, find the probability that he will answer all questions incorrectly. Round your answer to the nearest thousandth.

Hospitals like to have electricity provided when there is a blackout. Assume that the backup generators fail 38% of the time. Find the probability of a hospital with 2 back up generators failing at the same time. Round to 4 decimal places. Find the probability of at least one generator working during a blackout. Round to 4 decimal places.

A group of people were asked if they had run a red light in the last year. 273 responded "yes", and 289 responded "no". Find the probability that if a person is chosen at random, they have run a red light in the last year. Give your answer as a fraction or decimal to 4 decimal places Question Help: DVideo D Post to forum

Find the probability of rolling two dice that add up to 5. (leave your answer as a reduced fraction)

find the probability of choosing a letter other than N from a bag that contains the 15 letters of the name Bernard Riemann. Express your As a fraction in Lois terms or a decimal round to the nearest millionth

find the probability of guessing at least 9 out of 14 correctly. Round inetermediate calculations and final answers to three decimal places

A jar contains 17 red marbles and 20 blue marbles.  You reach in and pick 5 marbles at random (without replacement).  What are the chances they are all blue?  Write your answer as a decimal rounded to 3 decimal places.

Find the probability of throwing a sum of 8 at least 2 times 8 throws of a pair of fair 6-sided dice. Answer to the nearest 0.0001.

Find the probability that z is greater than -1.72.