[" 20.If in the expansion of "(x^(3)-(3)...

[" 20.If in the expansion of "(x^(3)-(3)/(x^(2)))^(15)" ,the "r^(" th ")" term is "],[" independent of "x" ,then r equals- "],[[" (a) "8," (b) "9],[" (c) "10," (d) None of these "]]

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