SOLUTION: I. Seven letter words are formed using the letters of the word BLACKER.
(a)How many which end in R? (b)How many in which E immediately follows K?
(c)How many do not begin with
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-> SOLUTION: I. Seven letter words are formed using the letters of the word BLACKER.
(a)How many which end in R? (b)How many in which E immediately follows K?
(c)How many do not begin with
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Question 130782: I. Seven letter words are formed using the letters of the word BLACKER.
(a)How many which end in R? (b)How many in which E immediately follows K?
(c)How many do not begin with B?(d)How many in which the vowels are separated by exactly two letters? (e)How many in which the vowels are seperated by two or more letters?
I understand how to use the permutation or combination formulas, but I truly do not understand how to apply them to these type problems. Please help in explaining.
Thank you very much! Answer by stanbon(75887) (Show Source):
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