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Three numbers are selected from the set ...

Three numbers are selected from the set `{1, 2, 3, ..., 23, 24}`, without replacement. The probability that the selected numbers form an A.P. is equal to

A

`(11)/(23)`

B

`(12)/(13)`

C

`(3)/(46)`

D

none of these

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The correct Answer is:
C
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