Asked Jan 17, 2019

Using multiplication principle what is the number of 3-letter words that can be formed ?


Expert Answer

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Step 1

We have to find the number of ways in which a 3-letter word can be formed using multiplication principle

Step 2

Multiplication principle says if there are m ways of doing one thing , n ways of doing other , then total number of ways would m times n 

Step 3

As we have to find the number of ways to form a 3-letter word 

Here we are considering that repitition of letters is allowed 

so we can say that first letter could be an...

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