The Wilson family was one of the first to come to the U.S. They had 8 children. Assuming that the probability of a child being a girl is .5, find the probability that the Wilson family had: at least 4 girls? at most 5 girls?

An urn contains 4 white balls and 6 red balls. A second urn contains 7 white balls and 3 red balls. An urn is selected, and a ball is randomly drawn from the selected urn. The probability of selecting the first urn is 0.4. If the ball is white, find the probability that the second urn was selected. (Round your answer to three decimal places.)

In a statistics class of 43 students, there were 15 men and  28 women. Five of the men and six of the women received an A in the course. A student is chosen at random from the class. 1. Find the probability that the student is a woman.2. Find the probability that the student received an A.3. Find the probability that the student is a woman or received an A.4. Find the probability that the student did not receive an A.

At Frosty Freeze, 5 of the last 20 sundaes sold had nuts. What is the experimental probability that the next sundae sold will have nuts? Simplify your answer and write it as a fraction or whole number. P(nuts) =