P&cK-5

10 DISTINCT alphabetas are given.
5 letter words are to be formed .
no. of ways in which at least one allphabet is repeated . is :

6 Answers

1133
Sourish Ghosh ·

105 - 10C5.5!

466
Himanshu Giria ·

the opts. are :
(A)

535
Aditya Agarwal ·

is the answer given as (A)?

535
Aditya Agarwal ·

i just didn't multiply by 5!. so it became
105 - 10C5. what i was thinking was that it asks us to find the number of ways..hence that omission.
I am not sure about the method..

466
Himanshu Giria ·

466
Himanshu Giria ·

i m saying so bcos in 100000 we r already includung the extra arrangements(not only selections) so we again need to delete thode arrangments .......

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