Of the 120 members attended the 1999 conference, 40 attended neither 1998 conference nor 1997 conference. How many members attended 1997 conference? 1). 25 members attended both 1997 conference and 1998 conference. 2). 30 attended 1997 conference but not 1998 conference. A question like this, not very sure. IN MY OPINION THE CORRECT WORDING SHOULD [...]

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