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Questions asked by the same visitor
A computer password uses 5 letters where no letter may be repeated. How many passwords are possible? A.26!/5! B.26!/21! C.21!/5!
Weegy: The answer is A.26!/5!. (More)
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Asked 10/26/2011 12:31:47 PM
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How many ways can a librarian arrange 15 books on a top shelf if she has 20 books from which to pick? A.20!/5! B.20!/15! C.15!/5!
Weegy: B.20!/15! (More)
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Asked 10/26/2011 12:39:14 PM
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How many different ways can a president and vice president be selected from a class of 22? A.484 B.462 C.44
Weegy: The answer is B.462. (More)
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Asked 10/26/2011 12:28:29 PM
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A representative from each of seven nations is to sit at a round table to discuss trade relations. How many ways can the representatives be seated? A.5,040 B.720 C.120
Weegy: A.5,040 is the answer. 7 factorial = 5040 (More)
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Asked 10/26/2011 12:29:21 PM
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How many 3 digit numbers can be made if no digit is repeated and the number can not begin with a zero? A.648 B.720 C.900
Weegy: The answer is B.720 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ It all depends on how precise you want to be: Technically, there are: 10*9*8 = 720 non-repeating three digit numbers Why? Because every time a digit is used, [ it is removed from the choices available for the other two digits. ] (More)
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Asked 10/26/2011 12:42:24 PM
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