Students at a particular university must be in exactly one of the class ranks: freshman, sophomore, junior, or senior. At this university, 35% of students are freshmen and 30% are sophomores. If a student is selected at random, what is the probability that the student is either a junior or a senior? P(junior or senior) % %3D

A drug is reported to benefit 40% of the patients who take it. If 6 patients take the drug, what is the probability that 4 or more patients will benefit?A.0.862 B.0.667 C.0.179 D.0.138

A class consists of 50 women and 21 men. If a student is randomly selected, what is the probability that the student is a women

A bag contains 1 gold marbles, 6 silver marbles, and 30 black marbles. You randomly select one marble from the bag. What is the probability that you select a gold marble? Write your answer as a reduced fraction.P(gold marble) =    ?

A department at a school comprises 10 faculty and 8 administrators. They organize a committee of 8 people from the department. The committee members are randomly selected. Complete parts a through d.    Determine the probability that the committee consists of five faculty and three administrators.

Each night in a family of four siblings, the parents randomly assign the order for the siblings to take their baths. What is the probability that the youngest will go last?

Robby wins 2 out of every 3 chess matches he plays with Marlene. What is the probability that he wins exactly 5 of the next 6 matches

In a class of students, the following data table summarizes how many students have a cat or a dog. What is the probability that a student chosen randomly from the class does not have a cat or a dog? Has a dog Does not have a dog Has a cat 9 6 Does not have a cat 2 11

Charles has six songs on a playlist. Each song is by a different artist. The artists are Joey McIntyre, Whitney Houston, Aaron Carter, Shakira, Shania Twain, and Phil Collins. He programs his player to play the songs in a random order, without repetition. What is the probability that the first song is by Aaron Carter and the second song is by Joey McIntyre? Write your answer as a fraction or a decimal, rounded to four decimal places.   The probability that the first song is by Aaron Carter and the second song is by Joey McIntyre is    .

At a college, 82 % of courses have final exams and 47 % of courses require research papers. Suppose that 44 % of courses have a research paper and a final exam.  Find the probability that a course has a final exam or a research project