Malegria Posted November 24, 2004 Share Posted November 24, 2004 Find the number of distinguishable five letter sequences that can be made from the letters in the word VERTICES. (Hint: separate into two cases: (1) sequences containing both E's; (2) all other sequences. OA 3720 Quote Link to comment Share on other sites More sharing options...
Alexey_KLexxRuss Posted November 24, 2004 Share Posted November 24, 2004 1. sequences with one E: 7*6*5*4*3=2520 2. others: 6*5*4*2c5=120*10=1200 total: 3720 Quote Link to comment Share on other sites More sharing options...
Malegria Posted November 24, 2004 Author Share Posted November 24, 2004 so.. u put both E's in one place? for q1? for q2 .. can u explain the reasoning? thanks Quote Link to comment Share on other sites More sharing options...
araspee Posted November 25, 2004 Share Posted November 25, 2004 so.. u put both E's in one place? for q1? for q2 .. can u explain the reasoning? thanks excluding two EE's from 8 6*5*4 and select the remaining two from five (5C2 ways) =6*5*4*10 Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.