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Three married couples are to be seated i...

Three married couples are to be seated in a row having six seats in a cinema hall. If spouses are to be seated next to each other, in how many ways can they be seated ? Find also the number of ways of their seating if all the ladies sit together.

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MODERN PUBLICATION-PERMUTATIONS AND COMBINATIONS-EXERCISE
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  14. A committee of 7 has to be formed from 9 boys and 4 girls. In how many...

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  15. A committee of 7 has to be formed from 9 boys and 4 girls. In how many...

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  16. Determine the number of 5 cards combination out of a deck of 52 cards ...

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  17. The English alphabet has 5 vowels and 21 consonants. How many words wi...

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  18. Find the number of permutations of n different things taken r at a tim...

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