69 96 81 79 83 99 89 67 90 77 85 98 66 91 77 69 80 94 uppose a student in this class is selected randomly D What is the probability that the grade is higher than 90? 3 What is the probability that the grade is lower than 90? 3 What is the probability that the grade is no lower than 80? ionsider the experiment of tossing a fair coin three times. For each toss, the possible outcomes are eads or tails. 9 List the equally likely events of the sample space for the three tosses. Q What is the probability that all tosses come up tails