2./How many 9 letter words (not necessarily meaningful) can you make from the word CHEMISTRY if a./ Each letter can be used only once. b./ Each letter can be used as many times as you wish. c./ The first 3 letters has to be CHE and for the rest, each letter can be used as many times as you want. d./ If you make your word randomly with the restrictions that each letter can be used only once, what is the probability that the first 3 letters will be CHE.

A First Course in Probability (10th Edition)
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ISBN:9780134753119
Author:Sheldon Ross
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Chapter1: Combinatorial Analysis
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Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...
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2./How many 9 letter words (not necessarily meaningful) can you make from the word
CHEMISTRY if
a./ Each letter can be used only once.
b./ Each letter can be used as many times as you wish.
c./ The first 3 letters has to be CHE and for the rest, each letter can be used as many
times as you want.
d./ If you make your word randomly with the restrictions that each letter can be used
only once, what is the probability that the first 3 letters will be CHE.
Transcribed Image Text:2./How many 9 letter words (not necessarily meaningful) can you make from the word CHEMISTRY if a./ Each letter can be used only once. b./ Each letter can be used as many times as you wish. c./ The first 3 letters has to be CHE and for the rest, each letter can be used as many times as you want. d./ If you make your word randomly with the restrictions that each letter can be used only once, what is the probability that the first 3 letters will be CHE.
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