anonymous
  • anonymous
in how many ways can a person answer 5 true or false questions?
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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katieb
  • katieb
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anonymous
  • anonymous
each question can be answered in 2 ways ie 2C1. there are 5 questions. so the no of ways is 2*2*2*2*2=32 ways
anonymous
  • anonymous
thhanks!!! but how about in how many ways the exam be completed if a penalty is imposed for each incorrect answer, so that a person may leave some questions unanswered?
UnkleRhaukus
  • UnkleRhaukus
so now there are three different ways to answer; true , false or blank

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UnkleRhaukus
  • UnkleRhaukus
when there were only two ways to answer there were \(2^5\) ways now there are three ways the are \(3^5\) ways
anonymous
  • anonymous
awesome! thank you very much!!!! :)
anonymous
  • anonymous
a customer using an automatic teller machine (atm) must enter a 4- digit pin number in order to gain access to his account. if repitition of the same four digits is not allowed.(eg 3333) how many possible combinations are there?
UnkleRhaukus
  • UnkleRhaukus
do you know to to find how many combinations possible , if repetition was allowed?
anonymous
  • anonymous
im not sure, im sucks at this :(
anonymous
  • anonymous
how many 4 digits number can be formed with 1, 2,3,6,7,8 if each digit is used most at once? how many of these smaller than 600? ans( 360, 60)
UnkleRhaukus
  • UnkleRhaukus
how many combinations can a digit be?

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