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[" 1stoned made by "],[qquad [rArr," 16....

[" 1stoned made by "],[qquad [rArr," 16.If "^((n+1))C_((r:1)):^(n)C:^((n-1))C_((r-n))=11:6:3," then "(n,r)],[,(a)1,2,(b)2,4],[" (c) "10,5," (d) "20,10]]

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