Remaining Time: 53 minutes, 15 seconds. Question Completion Status: QUESTION 1 Four fair coins are tossed. Success is defined as getting a head. What is the probability that the toss will result in at least three heads? At least 3 means 3 or more. No truncation or rounding of the answer please. QUESTION 2 Four fair coins are tossed. Success is defined as getting a head. What is the probability that the toss will result in either 0 or 4 heads? No truncation or rounding of the answer please QUESTION 3 Calculate the variance and standard deviation of the following numbers: 45, 55, 60, 70, 105. Variance = and Standard Deviation = (If your answer has more than 2 digits after the decimal point, round to 2 digits after the decimal point - for example, for 34 785, enter 34.79 and for 43.521. enter 43.52) Click Save and Submit to save and submit. Click Save All Answers to save all answers. Save Type here to search O -7" C