Question 1110066
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Use the general formula of the Probability theory 


    P(Accounting OR English)) = P(Acc) + P(Eng) - P(Acc AND English).  


With the given data, this equation / (equality) takes the form


      80%                     = 50%    +  60%   - P(Acc AND Eng)   ====>  (it implies that)

  
    P(Acc AND Eng) = 50% + 60% - 80% = 30%.


<U>Answer</U>.  The probability that he will pass both Accounting and English is 30%, under the given conditions.
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