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A chain of beads is to be prepared using...

A chain of beads is to be prepared using 6 different red coloured beads and 3 different blue coloured beads. In how many ways can this be done so that no two blue coloured beads come together.

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The correct Answer is:
`=(1)/(2)xx120xx6xx5xx4=7200`
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VIKRAM PUBLICATION ( ANDHRA PUBLICATION)-PERMUTATIONS AND COMBINATIONS-TAXTUAL EXERCISES
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  9. A book store has 'm' copies each of, 'n' different books. Find the num...

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  12. Find the number of ways of arranging the letters of the word ASSOCIATI...

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  14. If the letters of the word AJANTA are permuted in all possible ways an...

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  15. If ""^(n)P(4)=210, find n.

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  16. If ""^(12)C(r)=495, find the possible values of (r ).

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  17. If ""^(n)P(r)=5040 and ""^(n)C(r)=210, find n and r.

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  18. If ""^(n)C(4)=""^(n)C(6), find n.

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  19. If ""^(17)C(2t+1)=""^(17)C(3t-5), find t.

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  20. If ""^(9)C(3)+""^(9)C(5)=""^(10)C(r) then find r.

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