Personally I think the question is fine. the answer should be D. X,Y denotes the towns, "T" tall, "L" lefty , "TL" tall and Lefty, and "tl" neither tall nor lefty. soo we get from the question YL=3XL YT=3XT YTL=3XLT Ytl = 0 and 4Ytotal = Xtotal then form simul...