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Two distinct numbers are selected simultaneously and at random from the set (1,2,3,4,5) . What is the probability that the smaller one divides the larger one? Express your answer as a common fraction.

 

 

 

 

 

 

 

Thanks!

 Feb 1, 2019
 #1
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We have 5C2 = 10 possible sets......let's list these

(1,2)   (2, 3)  (3, 4) (4,5)

(1,3)   (2, 4)  (3, 5)

(1, 4)  (2,5)

(1, 5)

 

Note that 1/2 of these meet the criteria of having the larger number being divisible by the smaller

 

 

cool cool cool

 Feb 1, 2019

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