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Two candidates A and B appear for an interview for two varancies the probablity of A being selected is 1/7 and B being selected is 1/5find the probablity

1. both will not be selected
2.atleast one will not be selected
3.atleast one will be selected
4.exactly one will be selected


 1. 0
 2. 0
 3. If A then the probability is  1/7
     If B then the probability is  1/5
4. 1/7 or 1/5
0 0 0
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