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avatar+928 

Answer: 7/15

 Aug 11, 2019
 #2
avatar+105540 
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I found the prob that 2 ARE consecutive first.

 

This is how, I draw a table

 

How many ways can three be chosen from 10.  That is 10C3 = 120

 

So the probability that 2 of the numbers will be consecutive is     64/120 = 8/15

and

The probability that NO 2 of the numbers will be consecutive is     7/15

 Aug 11, 2019

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