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17. Combinations
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Q11 of 118 Page 17

Write the total number of words formed by 2 vowels and 3 consonants taken from 4 vowels and 5 consonants.

2 out of 4 vowels and 3 out of 5 consonants can be chosen in 4C25C3 ways.


The total number of letters is 5. These letters can be arranged in 5! ways.


Total number of words =


4C25C3 5!



= 6 10 120


= 7200


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Questions · 118
17. Combinations
1 1 1 1 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 20 20 20 1 2 3 4 5 5 5 6 7 8 8 8 9 10 11 12 13 14 15 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 30 30 31 32 33 1 2 3 3 3 4 5 6 7 8 9 10 11 1 2 3 4 5 6 7 8 9 10 11 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27
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