Posted by **justme** on Saturday, October 15, 2011 at 2:34pm.

Three dierent numbers are chosen at random from the set f1; 2; 3; 4; 5g.

The numbers are arranged in increasing order.

What is the probability that the resulting sequence is an arithmetic sequence?

- math -
**justme**, Saturday, October 15, 2011 at 2:35pm
*different

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