+0  
 
-1
91
1
avatar

Two distinct integers, x and y, are randomly chosen from the set {1,2,3,4,5,6,7,8,9,10}. What is the probability that xy is even?

 Dec 10, 2020
 #1
avatar
+1

c=0;listforeach(n, d=(2, 3, 4, 5, 6, 6, 7, 8, 8, 9, 10, 10, 12, 12, 14, 15, 16, 18, 18, 20, 20, 21, 24, 24, 27, 28, 30, 30, 32, 35, 36, 40, 40, 42, 45, 48, 50, 54, 56, 60, 63, 70, 72, 80, 90), m=if(n%2==0, c=(c,n), 0);print c[1, count c-1],">>Total =", count c-1>>Total = 45 such products.

 

(2, 4, 6, 6, 8, 8, 10, 10, 12, 12, 14, 16, 18, 18, 20, 20, 24, 24, 28, 30, 30, 32, 36, 40, 40, 42, 48, 50, 54, 56, 60, 70, 72, 80, 90) >>Total = 35 EVEN numbers

 

Probability = 35 / 45 == 7 / 9

 Dec 10, 2020

76 Online Users

avatar
avatar
avatar
avatar