I just able to answer 1 of 2 question. please find attached file regarding my calculation regarding the second part of the question.

the correct ans from the book is 30.

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- July 17th 2013, 06:51 AMnikconsultPermutation (Basic)
I just able to answer 1 of 2 question. please find attached file regarding my calculation regarding the second part of the question.

the correct ans from the book is 30. - July 17th 2013, 07:46 AMPlatoRe: Permutation (Basic)
- July 17th 2013, 06:56 PMnikconsultRe: Permutation (Basic)
thank you mr ploto.. i try to solve it. why should we separate it into 2 case here & add??