The following problem refers to strings in A, B, ..., Z.

label Mathematics
account_circle Unassigned
schedule 1 Day
account_balance_wallet $5

Jun 21st, 2015

Thank you for the opportunity to help you with your question!

If repetition  of digits are allowed then

First place can be filled only by S = 1

second place can be filled by  , 26 ways (a ,b,c -----z)  ... similarly third & fourth  : 26 ways each

hence total ways = 1*26*26*26 =17576  (Answer)

If repetition  of digits is not  allowed then

First place can be filled only by S = 1

second place can be filled by  , 25P1 = 25!/24! = 25 ways

third  place can be filled by  , 24P1 = 24!/23! = 24 ways 

& fourth place can be filled by  , 23P1 = 23!/22! = 23 ways

hence total string possible = 1*25*24*23 =  13800  (Answer)


please confirm repetation is allowed or not   & According choose the correct answer from above 2


Please find the solution enclosed here with .. In case of any doubt please feel free to ask… Do not forget to best my answer… If you are having some other problem please feel free to contact me for quick & quality services..
Jun 21st, 2015

Did you know? You can earn $20 for every friend you invite to Studypool!
Click here to
Refer a Friend
...
Jun 21st, 2015
...
Jun 21st, 2015
Sep 20th, 2017
check_circle
Mark as Final Answer
check_circle
Unmark as Final Answer
check_circle
Final Answer

Secure Information

Content will be erased after question is completed.

check_circle
Final Answer