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Scam calls are becoming an infuriating part of people s daily lives. According to Truecaller, Americans lost $ 3 0 billion from phone scams in
Scam calls are becoming an infuriating part of peoples daily lives. According to Truecaller, Americans lost $ billion from phone scams in which is $ more than the total amount lost in Neighborhood spoofing use a number starting with your area code is the most common among all scams. Now suppose
of your incoming phone calls are scam calls. Among the scam calls
use neighborhood spoofing. Of your nonscam incoming phone calls,
are from numbers that start with your area code.
Given that a randomly selected incoming phone number starts with your area code, whats the probability it is not a scam call? Please round your answer to decimal place.
Hint: You can draw a tree diagram on your scratch paper to illustrate the information.
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