Mathematics, 15.04.2020 03:52 melikefood01
A multiple choice test is composed of 10 questions. Each question has four possible answers, only one of the four possible answers is correct. A student randomly selects the answer for each question. Assume that all selections are independent. Let X count the student's number of correct answers on the test. a) What is the expected number of correct answers? Round your answer to the nearest tenth. b) What is the standard deviation of the number of correct answers? Round your answer to the nearest hundredth. c) What values of the random variable are within two standard deviations of the mean? d) What is the probability that the student answers exactly 4 questions correctly? Round your answer to the nearest ten- thousandth. e) If at least 6 questions must be answered correctly to pass the test, what is the probability that the student passes the test? Round your answer to the nearest ten-thousandth.
Answers: 2
Mathematics, 21.06.2019 21:00, rileyeddins1010
Which of the functions graphed below has a removable discontinuity?
Answers: 2
Mathematics, 21.06.2019 22:30, CatelynBGray
Aaron invested a total of $4,100, some in an account earning 8% simple interest, and the rest in an account earning 5% simple interest. how much did he invest in each account if after one year he earned $211 in interest? select one: a. $200 at 8%, $3,900 at 5% b. $3,200 at 8%, $900 at 5% c. $900 at 8%, $3,200 at 5% d. $3,900 at 8%, $200 at 5%
Answers: 1
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