## 21. In how many ways can a committee of 4 people be chosen out of 8 people?

## 22. In how many different ways can the letters of the word EXTRA be arranged so that the vowels are never together?

## 23. In how many different ways can the letters of the word ‘BAKERY’ be arranged?

## 24. In how many different ways can the letters of the word DAILY be arranged?

## 25. In how many different ways can letters of the word OFFICES be arranged?

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