SOLUTION: If A = {a, b, c, d} and B = {1, 2, 3, 4}, how many different one-to-one correspondences can be made? 4 I answered four but I don't know if my above answer is correct?

Algebra ->  Exponents -> SOLUTION: If A = {a, b, c, d} and B = {1, 2, 3, 4}, how many different one-to-one correspondences can be made? 4 I answered four but I don't know if my above answer is correct?      Log On


   

Question 466204: If A = {a, b, c, d} and B = {1, 2, 3, 4}, how many different one-to-one correspondences
can be made? 4
I answered four but I don't know if my above answer is correct?
Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
A = {a, b, c, d} and B = {1, 2, 3, 4}, how many different one-to-one correspondences
can be made? 4
I answered four but I don't know if my above answer is correct?
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a can be matched with 4 choices
b can be matched with 4 choices
c same
d same
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# of possible one-to-one matces = 4^4 = 256
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Cheers,
Stan H.