IIT JEE PERMUTATIONS AND COMBINATIONS Statement 1: When number of ways of arranging 21 objects ...

Statement 1: When number of ways of arranging 21
objects of which `r`
objects are
identical of one type and remaining are identical of second type is maximum,
then maximum value of `^13 C_ri s78.`

Statement 2: `^2n+1C_r`
is maximum
when `r=ndot`

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