In: Statistics and Probability
Problem 7-28 A student selects his answers on a true/false examination by tossing a coin (so that any particular answer has a .50 probability of being correct). He must answer at least 70% correctly in order to pass. Find his probability of passing when the number of questions is
(a) 10 Pr=
(b) 20 Pr=
(c) 50 Pr=
(d) 100 Pr=