anonymous
  • anonymous
the number of arrangements can be made taking 4 letters at a time out of the letters of the word PASSPORT
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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katieb
  • katieb
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dan815
  • dan815
P,A,S,O,R,T P S
dan815
  • dan815
case1) no repeating letters case2)repeating Ps only case3)repeats S only case4)repeating P and s
dan815
  • dan815
case1)=6! case2)=5*4*(4choose2) case3) =5*4*(4choose2) case4) = (4 choose 2)

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anonymous
  • anonymous
In the case one, should't it be 6 x 5 x 4 x 3 and not 6 ! and can you please explain the last case?
anonymous
  • anonymous
@dan815
dan815
  • dan815
that should be 6*5*4*3 yes thats a mistake
dan815
  • dan815
the last case we are looking at P,P,S,S how many ways to arrange that
dan815
  • dan815
thats 4!/(2!2!)
anonymous
  • anonymous
And in case 2 and 3 it will be like : 5 x 4 x 4!/2! x 2! ? Why 4!/2! x 2! ? ( that will be similar as case 4 then? @dan815
dan815
  • dan815
yeah because
dan815
  • dan815
uh its too much to explain typing =.=
dan815
  • dan815
just think about it lol

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