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A = {2, 3, 5, 7, 11}
B = {2, 4, 6, 13}
Two integers will be randomly selected from sets A and B, one integer from set A and one from set B, and then multiplied together. How many different products can be obtained?
A. 15
B. 16
C. 19
D. 20
E. 36
The OA is C.
It can be easily done by making pairs, but can somebody tell me how to do it using combinations or some other short-cut? Thanks!
B = {2, 4, 6, 13}
Two integers will be randomly selected from sets A and B, one integer from set A and one from set B, and then multiplied together. How many different products can be obtained?
A. 15
B. 16
C. 19
D. 20
E. 36
The OA is C.
It can be easily done by making pairs, but can somebody tell me how to do it using combinations or some other short-cut? Thanks!
