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The number of 4 letter words than ca...

The number of 4 letter words than can be formed using the letters of the word EXPLAIN which begin with an vowel when repetitions are allowed is

A

1029

B

207

C

343

D

2401

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The correct Answer is:
A
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DIPTI PUBLICATION ( AP EAMET)-PERMUTATIONS & COMBINATIONS-EXERCISE 1A (PERMUTATIONS )
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  16. Eight different letters of an alphabet are given . Words of f...

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  17. ten different letters of alphabet are given . Words with 5 lett...

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  18. The number of four letter words using the letters of the word ...

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  19. The number of 4 letter words that can be formed with the letters in th...

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