1.

Three numbers are chosen from 1 to 20. The probability that they are not consecutive is(a) 186190 (b) 187190 (c) 188190 (d) 18C320

Answer» Three numbers are chosen from 1 to 20. The probability that they are not consecutive is



(a) 186190 (b) 187190 (c) 188190 (d) 18C320


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