lyniasmith lyniasmith
  • 12-10-2017
  • Mathematics
contestada

In how many ways can letters of the set ( R,S,T,U,) be arranged to form ordered codes of 2 letters ?

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ca0109
ca0109 ca0109
  • 12-10-2017
RS
RT
RU
SR
ST
SU
TR
TS
TU
UR
US
UT
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