+0  
 
0
124
2
avatar

a is chosen from the set {1,2,3,4,5}, and b is chosen from the set {5,6,7,8,9}. What is the probability that the product ab is a prime number?

 Jul 28, 2021
 #1
avatar+35345 
+1

The only ab from the set that would be a prime number would be   1 * 5     or   1*5   out of 25 possible products.

 Jul 28, 2021
 #2
avatar+35345 
0

*** edit ***   answer does not change

 

The only ab from the set that would be a prime number would be   1 * 5     or   1*7   out of 25 possible products.

ElectricPavlov  Jul 28, 2021

16 Online Users

avatar