A 4-sided die is fair and the sides are numbered 1, 3, 6, 10.  This die is rolled twice and the random variable is defined to be the sum.  What is the expected value?

An urn contains 3 red balls, 5 green balls and 2 yellow balls. An experiment consists of picking 3 balls simultaneously. What is the probability that you pick at least 2 green balls?

Jenna buys a bag of cookies that contains 5 chocolate chip cookies, 9 peanut butter cookies, 7 sugar cookies and 4 oatmeal cookies. What is the probability that Jenna randomly selects a sugar cookie from the bag, eats it, then randomly selects a chocolate chip cookie? Probability = (Round your answer to 4 decimal places.)

A student takes a 10 question true or false test he has not attended class nor study the material and so he guesses on every question find the probability distribution of the random variable representing the number of questions he got correct what is the probability he gets exactly 5 questions correct.

A shipment of 11 microwave ovens contains 2 defective units. A restaurant buys four of these units. What is the probability of the restaurant buying at least three nondefective units? The probability of the restaurant buying at least three nondefective units is (Round to three decimal places as needed.)