Month: April 2014

Problem 129 On a TV game show, the contestant is asked to select a door and then is rewarded with the prize behind the door selected. If the doors can…

Problem 128 What are the odds in favor of getting at least one head in three successive flips of a coin?   Solution   There are 7 cases when we…

Problem 127  Consider the experiment of drawing two cards without replacement from an ordinary deck of 52 playing cards. What are the odds in favor of drawing a spade and…

Problem 126 Jack is taking a four-item true–false test. He has no knowledge about the subject of the test and decides to flip a coin to answer the items. a.…

Problem 125 In the tests of a new pharmaceutical product, data were collected for use in the approval process required by the U.S. Food and Drug Administration (FDA). Some participants…

Problem 124 A box contains two black balls and three gold balls. Two balls are randomly drawn in succession from the box. a. If there is no replacement, what is…

Problem 123 A pair of dice are rolled and the sum on their upturned faces is recorded. What is the probability that the sum showing is 8, given that one…

Problem 122 Two cards are drawn without replacement from an ordinary deck of 52 playing cards. What is the probability that both are spades if the first card drawn was…

Problem 121 How many three-symbol codes (letter-number-number) can be made from the letters S, P, Y, and two digits from the set {0, 1, 2, … , 9} without repetition?…

Problem 120 If P(A) =  and P(B) = , and P(A and B) = 0, what can you say about P(A or B)?   Solution   P(A or B) =…