A: {71,73,79,83,87} B:{57,59,61,67} If one number is selected at random from set A, and one number is selected at random from set B, what is the probability that both numbers are prime?
A.920
B.35
C.34
D.45
E.1
我的答案:
A: {71,73,79,83,87} B:{57,59,61,67}
If one number is selected at random from set A, and one number is selected at random from set B, what is the probability that both numbers are prime?