How many permutations of letters abcdefgh contain

Search Advanced search…. New posts. Search forums. Log in. Install the app. For a better experience, please enable JavaScript in your browser before proceeding. You are using an out of date browser. It may not display this or other websites correctly. You should upgrade or use an alternative browser. Thread starter Havie Start date Nov 17, Havie New member. Joined Nov 17, Messages Hello all, I have come back to college after a of years out of school, I am struggling with a few concepts in my discrete math class and some further help would be greatly appreciated as I have exhausted all other tutoring avenues.

So I went about solving this the total wrong way, Question 1 what part of this problem is clarifying that rule? I feel like it could go either way and is almost up for interpretation. Thanks for your help and time. Peterson Elite Member.

Joined Nov 12, Messages 12, Havie said:. Click to expand Peterson said:. The word "string" refers to an ordered list without reference to repetitions. It isn't used as often in math as, say, "permutation", so you can be excused for not being familiar with it, but it is defined. And it surely means the same thing outside of math. I'm not sure what you mean by "X" in your notation. Can you explain?

Is this something you were taught, or your own invention? There are 5! If you are still unsure, please explain more fully what you think is not being handled properly. Last edited by a moderator: Nov 17, Were you taught to write your calculations as multiplications of things rather than of numbers as you are doing? I don't think it's a safe thing to do. BCD isn't a number you can multiply. The notation may be what is confusing you. You haven't clarified what you mean by this last question, which is what I asked about.

Asked 7 years, 7 months ago. Active 7 years, 7 months ago. Viewed 1k times. My reasoning? Community Bot 1. Cozen Cozen 3 3 gold badges 12 12 silver badges 24 24 bronze badges. Add a comment. Active Oldest Votes. Batman Batman I get the supper letter thing, but it can't be expressed in terms of n and k? Sign up or log in Sign up using Google. Sign up using Facebook. Sign up using Email and Password. Post as a guest Name. Email Required, but never shown. Upcoming Events. Featured on Meta. Now live: A fully responsive profile.

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