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Five-letters-are-selected-from-




Question Number 198022 by cortano12 last updated on 08/Oct/23
  Five letters are selected from
Fivelettersareselectedfrom
Answered by mr W last updated on 08/Oct/23
OOOXX  ⇒2  OOOXY  ⇒2×C_2 ^4 =12  totally: 2+12=14
OOOXX2OOOXY2×C24=12totally:2+12=14

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