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  • The number of words that can be created with just 5 letters, provided that at least one of the letters from A to H can be repeated.Option: 1 <

The number of words that can be created with just 5 letters, provided that at least one of the letters from A to H can be repeated.

Option: 1

15180


Option: 2

21040


Option: 3

26048


Option: 4

32060


Answers (1)

best_answer

The number of required words $=$ The total number of words with repetition allowed - The number of words in which no alphabet is repeated

The required number of words = 8^5-{ }^8 P_5

\begin{aligned} & 8^5-{ }^8 P_5=32768-6720 \\ & 8^5-{ }^8 P_5=26048 \end{aligned}

Therefore, the total number of ways is 26048 ways.

Posted by

Deependra Verma

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