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A library has two books each having thre...

A library has two books each having three copies and three other books each having tow copies. In how many ways can all these books be arranged in a shelf so that copies of the same book are not separated.

A

`((a+b+c+d)!)/(a!b!c!)`

B

`((a+2b+3c+d)!)/(a!(b!)^(2)(c!)^(3))`

C

`((a+2b+3c+d)!)/(a!b!c!)`

D

none of these

Text Solution

Verified by Experts

The correct Answer is:
B
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OBJECTIVE RD SHARMA ENGLISH-PERMUTATIONS AND COMBINATIONS-Exercise
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  9. Given that .^(n)C(n-r)+3^(n)C(n-r+1)+3. .^(n)C(n-r+2)+.^(n)C(n-r+3)=...

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  14. The numbers of four different digits number that can be formed from th...

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  15. If m and n are positive integers more than or equal to 2, mgtn, then (...

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  16. Find the number of integers which lie between 1 and 10^6 and which hav...

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  19. Out of 10 consonants four vowels, the number of words that can be form...

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