Problem 140

Problem 140 Five numbers are to be picked, without repetition, from 44 numbers to determine the winner of the Fortune Five game in the state lottery. If the order of…

Problem 139

Problem 139 A class elects two officers, a president and a secretary/treasurer, from its 12 members. How many different ways can these two offices be filled from the members of…

Problem 138

Problem 138  How many batting lineups of the nine players can be made for a baseball team if the catcher bats first, the shortstop second, and the pitcher last?  …

Problem 137

Problem 137  How many 4-character license plates are possible with 2 letters from the alphabet followed by 2 digits, a. if repetitions are allowed? b. if repetitions are not allowed?…

Problem 136

Problem 136 Battery Power Problem. A certain type of thermal battery for an airplane navigation device backup power has a mean life of 300 hours with a standard deviation of…

Problem 135

Problem 135  A study of motor vehicle rates in the 50 states reveals that traffic death rates (deaths per 100 million motor vehicle miles driven) can be modeled by the…

Problem 134

Problem 134  The mean systolic blood pressure of adult males is normally distributed with a mean of 138 (millimeters of mercury) and a standard deviation of 9.7. What percent of…

Problem 132

Problem 132 In each case, consider what you know about the distribution and then explain why you would expect it to be or not to be normally distributed. a.    The…