The three card is numbered 1, 2, 3
The lettered chosen is; A, B, C
Sample space is ;
1A, 1B, 1C, 2A, 2B, 2C, 3A, 3B, 3C
Outcomes for even that the number chosen is 1 is;
1A, 1B, 1C
Outcome for the event that the letter chosen is c is;
1C, 2C, 3C
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