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[" (D) A boy has "20%" chance of hitting...

[" (D) A boy has "20%" chance of hitting at a target.Let p denote "],[" the probability of hitting the target for the first time at the "n^(H)],[" trial.If p satisfies the inequality "625p^(2)-175p+12<0" ,then "],[" value of "n" is "]

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