At a raffle, 10,000 tickets are sold at $5 each for three prizes valued at $4,800, $1,200, and $400. What is the expected value of one ticket? O A. $0.64 O B. - $0.64 A test consists of 570 true or false questions. If the student guesses on each question, what is the standard deviation of the number of correct O C. $4.36 answers? Round the answer to the nearest hundredth. OD. - $4.36 O A. 2.00 Find the mean of the binomial distribution for which n = 80 and p = 0.2. Round the answer to the nearest hundredth, as needed. O B. 0.00 O C. 11.94 OD. 16.88 O A. 40.00 O B. 3.58 O C. 80.00 O D. 16.00