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avatar+200 

Alex chooses a number at random from the set {1, 2, 3, 4, 5}.  Winnie also chooses a number at random from the same set.  (They can choose the same number.)  What is the probability that the product of their numbers is at least 4?

 
 Apr 7, 2026
 #1
avatar+243 
0

The probability is 12/25.

 Apr 11, 2026
 #2
avatar+37194 
+1

There are 25 possible choices  ( w = with)  

 1    w    1 2 3 4 5 

 2    w    1 2 3 4 5

 3    w    1 2 3 4 5 

 4    w    1 2 3 4 5

 5    w    1 2 3 4 5               the bold choices produce a product 4 or greater     20 out of 25 choices    is  20/25 =  4/5 = .80 = 80 % 

                                                                                                                                                                              ( pick your format)  

 Apr 11, 2026

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