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Three numbers are chosen from 1 to 20. F...

Three numbers are chosen from 1 to 20. Find the probability that they are consecutive.

A

`(18)/(""^(20)C_(3))`

B

`(17)/(""^(20)C_(3))`

C

`(18)/(""^(18)C_(3))`

D

`(18)/(""^(18)C_(4))`

Text Solution

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The correct Answer is:
A
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