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Ace Test Series: Discrete Maths - Combinatory
Ismail
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Combinatory
Jan 20, 2018
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Mar 3, 2019
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Ismail
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Jan 20, 2018
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gauravkc
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Jan 20, 2018
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9 ?
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Ismail
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Jan 20, 2018
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No answer given as 540 ... They are using onto fuction but i m not getting why so
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gauravkc
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Jan 20, 2018
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I did like this.
It can be 1 1 4 type or 1 2 3 type distribution.
1 1 4 can be arranged in 3 ways and 1 2 3 in 6 ways. So 9 ways.
Since they are different books, we can arrange them in 6! ways.
But 6! * 9 = 6480 :p
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Nope... Answer is 540
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540 will be answer
sumit goyal 1
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Jan 20, 2018
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gauravkc
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I didn't get the method
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sumit goyal 1
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hmm its distribution and division of object , i studied from many places :P
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Ismail
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I also didn't understood this method do you have any source to study this method?
Its like permutation with repetition method right??
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