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[" Whe correct alternative in each of th...

[" Whe correct alternative in each of the following: "],[" 1.The number of permutations of "n" different things taking ratatime when "3" particular "],[" thengs are to be included is "],[[" (a) "n-3p_(r-3)," (b) "n-3p_(r)," (c) "^(n)P_(r-3)," (d) "r!^(n-3)C_(r-3)]],[[" (a) "n-3p_(r-3)," (b) "^(n-3)P_(r)," (c) "^(n)P_(r-3)," (d) "r!^(n-3)C_(r-3)]]

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