Q. 83.7( 6 Votes )

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Answer :

To find: the value of n


Formula Used:


Total number of ways in which n objects can be arranged in r places (Such that no object is replaced) is given by,


nPr


n+5Pn+1 = (n – 1). n+3Pn







(n - 7)(n - 6) = 0


n = 7, 6


Hence, values of n are 7 & 6


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