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Permutation help! 10 points best answer?
Let each different arrangement of all letters of DELETED be called a word.
i) how many words are possible
ii) in how many of these words will the Ds be separated?
I have already figured out part i), that bit was straightforward.. I'm just having extreme difficulties with part 2!
2 Answers
- Anonymous1 decade agoFavorite Answer
DELETED
D=2
E=3
L=1
T=1
No. of permutation=7!/(2!*3!*1!*1!)
=7*6*5*4*3!/(2*1*3!)=21*20=420
- ?Lv 61 decade ago
DELETED DELETE DELED DEED DEET DELE LEET TEED TEEL TELE DEE DEL EEL ELD LED LEE LET TED TEE TEL DE EL ET
