I have a couple questions regarding, well, a couple questions.
1.) A jar contains four coins: a nickel, a dime, a quarter, and a half-dollar. Three coins are randomly selected from the jar.
(a) List the simple events in S. (Use N for nickel, D for dime, Q for quarter, and H for half-dollar.)
(b) What is the probability that the selection will contain the half-dollar? (Enter an exact number as an integer, fraction, or decimal.)
(c) What is the probability that the total amount drawn will equal 55¢ or more? (Enter an exact number as an integer, fraction, or decimal.)
okay, forgive me if this is a dumb question, but with a question like this, does order matter? For instance, would NDQ be different than QDN?
2.) A student prepares for an exam by studying a list of 10 problems. She can solve 3 of them. For the exam, the instructor selects 2 questions at random from the list of 10. What is the probability that the student can solve all 2 problems on the exam? (Enter an exact number as an integer, fraction, or decimal.)
My answer is 0.0333. With my teacher, I only get three chances to get the answer correct, so I just wanted to see if this was correct.
Thank you in advance