SOLUTION: 1. How many strings of 5 lower case English letters
are there that have the letter x in them somewhere? Here strings
may use the same letter more than once. (Hint: It might be ea
Algebra ->
Permutations
-> SOLUTION: 1. How many strings of 5 lower case English letters
are there that have the letter x in them somewhere? Here strings
may use the same letter more than once. (Hint: It might be ea
Log On
Question 356973: 1. How many strings of 5 lower case English letters
are there that have the letter x in them somewhere? Here strings
may use the same letter more than once. (Hint: It might be easier
to first count the strings that don’t have an x in them.)
2. If 5 -letter “words” are formed using the letters A,
B, C, D, E, F, G, how many such words are possible for each of
the following conditions:
(a) No condition is imposed.
Your answer is :
(b) No letter can be repeated in a word.
Your answer is :
(c) Each word must begin with the letter A and letters can be
repeated.
Your answer is :
(d) The letter C must be at the end and letters can be repeated.
Your answer is :
(e) The second letter must be a vowel and letters can be repeated. Answer by edjones(8007) (Show Source):
