Richard has been given an 11-question multiple-choice quiz in his history class. each question has five answers, of which only one is correct. since richard has not attended the class recently, he doesn't know any of the answers. assuming that richard guesses on all 11 questions, find the probability that he will answer at least 4 questions correctly. round your answer to the nearest thousandth. a. 0.111 b. 0.161 c. 0.364 d. 0.073 e. 0.5

Kevin has a spinner that has 10 equal sections and 2 sections of each color—red, blue, green, yellow, and purple. kevin spins the spinner 180 times. kevin determines about how many times the spinner will land on red or green, and his work is shown below. -kevin has the formula reversed; it should be the total number of sections over the number of red or green sections. -kevin should have used a 4 in the numerator because there are 2 red sections and 2 green sections. -kevin should multiply by the number of sections in the spinner rather than the total number of spins. -kevin calculated the prediction correctly and did not make any mistakes.