Question Number 103367 by bobhans last updated on 14/Jul/20

many words with 4 letters can be formed  using letters from the word  TINKUTARA is ___

Answered by mr W last updated on 15/Jul/20

we have following letters:  AA,TT,INKUR    to form a 4 letter word, we have  following cases:  xxyy ⇒((4!)/(2!2!))=6 ways  xxyz ⇒2×C_2 ^6 ×((4!)/(2!))=360 ways  xyzw ⇒C_4 ^7 ×4!=840 ways  ⇒total 6+360+840=1206

Commented bybramlex last updated on 15/Jul/20

cooll