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We wish to select 6 persons from 8, but ...

We wish to select 6 persons from 8, but if the person A is chosen, then B must be chosen. In how many ways can the selections be made? 15 (b) 22 (c) 7 (d) None of these

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22
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MODERN PUBLICATION-PERMUTATIONS AND COMBINATIONS -Revision Exercise
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  3. How many words, with or without meaning, each of 2 vowels and 3 con...

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  4. In how many ways can the letters of the word ASSASSINATION be arranged...

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  5. In how many different ways, the letters of the word 'ALGEBRA' can be a...

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  6. Five girls and five boys are to be seated on a bench with the boys and...

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  7. We wish to select 6 persons from 8, but if the person A is chosen, the...

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  8. A mathematical club consists of 18 members. In how many ways can the ...

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  9. There are 6 items in column A and 6 items in column B. A student is as...

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  10. A code word is to consist of two distinct English alphabets followed b...

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  11. How many 4-letter words, with or without meaning, can be formed out of...

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  12. Find the number of permutations of the letters of the words : 'DADDY ...

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  13. In how many different ways can the word 'EATERANEATER' be arranged so ...

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  14. Three married couples are to be seated in a row having six seats in a ...

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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 card combinations out of a deck of 52 cards ...

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

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  18. A coin is tossed 5 times. Determine the number of ways in which 0 hea...

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  19. A number of 18 guests have to be seated, half on each side of a lon...

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  20. A student is allowed to select at most n books from a collection of (...

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