- Option : A
- Explanation : 3 consonants out of 5 can be selected in
^{5}C_{3}ways. 2 vowels out of 4 can be selected in^{4}C_{2}ways. Therefore, total number of groups each containing 3 consonants and 2 vowels =^{5}C_{3 }*^{4}C_{2}= 5*6=30 Each group contains 5 letters, which can be arranging in 5! ways. Therefore required number of words = 30* 5! = 3600

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- Option : A
- Explanation : Required number of ways are 4
^{5}=1024. Since each prize can be distributed in 4 ways

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- Option : A
- Explanation :

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