Question 1135163
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Since in this problem the number of adults in the city <U>IS NOT SPECIFIED</U>, we only can assume by default that this number is <U>VERY LARGE</U>.


    And it is <U>THE ONLY WAY</U> on how we can treat/interpret the condition.


All what we know (and what is given to us) in this problem is that the probability for randomly selected adult to be employed 
in the tourism industry is 0.35.


At this context and under given condition, the solution to the problem and the <U>ANSWER</U> is  {{{0.35^3}}} = 0.042875.



Interpretation given and used by @mathsolverplus in his post is incorrect and non-adequate.
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It is just, probably, couple of weeks I observe an activity of @mathsolverplus at this forum.


Regarding this activity, I can resume that for routine problems @mathsolverplus, probably, can provide valid solutions 
(although not always).


But for the problems "one step away from routine" the probability he provides incorrect answers becomes dangerously high.


Under supervision and correction from other tutors in this forum, it still can be kept in some reasonable frames 
(although, I personally am not very happy to clean after him . . . ).


But as a self-standing tutor at his own web-site, without supervising and corrections from other tutors he is not able 
to provide error-proven (error-free) solutions on stable basis.


Keep it in your mind if/when you will consider to follow him at his web-sites.


You will be at constant risk of getting wrong solutions.