Question

Two integers are randomly selected from sets below, one integer from set A and one
integer from set B. A = { 5,6,7,8,9}, B = {3,4,5,6}.What is the probability that the sum
of two integers will equal 9?

Answer 1

the probability is 2/20

Answer 2

the sample space is 5x4 = 20 possible outcomes

Answer 3

and there are only two outcomes that give 9 - 5,4 and 6,3

Answer 4

thanks stewart

Answer 5

5,4 is different with 4,5 also 6,3 and 3,6

Answer 6

\[\text{Probability}=\frac{\text{Matching number of cases}}{\text{Total number of cases}}\]