Question 1190754
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A certain retail establishment accepts either the American Express or the VISA credit card. A
total of 22 percent of its customers carry an American Express card, 58 percent carry a VISA 
credit card, and 14 percent carry both. What is the probability that a customer will have at least
one of these cards?
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<pre>
Apply a standard formula for the probability of a union


    P(American Express or Visa) = P(American Express) + P(Visa) - P(both)    

or

    P(American Express or Visa) = 22% + 58% - 14% = 66%.      <U>ANSWER</U>
</pre>

Solved.