9. How many different three letters can you form from the first 11 letters of the alphabet if no two letters are alike? A. 33 B. 990 C. 330 D. 99 10. In how many ways can 9 people occupy the 9 seats in a front row? A. 81 B. 8 100 C. 40 320 D. 362 880
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How many different three-letter words can be formed from the first letters of the alphabet if the letters are alike? There are 26 letters in the alphabet, and since the letters are alike, we only need to choose one letter and repeat it three times. Therefore, Show more…
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