rohan2345 wrote:
Of the people who attended a conference, some are professors and some are scientists. If 80% of the scientists are also professors, is the number of scientists more than the number of professors?
(1) 45% of the attendees are neither a professor nor a scientist.
(2) 50% of the professors are alsoscientists.
Only scientist = a
only professor = c
scientist and professor = b
0.8(a+b) = b
b = 4a ------(i)
To find whether a>c??
(1) No information of a and c. Insufficient
(2) 0.5(b+c) = b
b
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