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A digit is selected at random from eithe...

A digit is selected at random from either of the two sets {1, 2, 3, 4, 5, 6, 7, 8, 9} and {1, 2, 3, 4, 5, 6, 7, 8, 9}. What is the chance that the sum of the digits selected is 10?

A

a) 1/9

B

b) 10/81

C

c) 10/18

D

d) 1/81

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