a selected number of constituents of a certain barangay were asked about their preference between classical and popular songs. Thirty-four of them like classical songs, no one likes popular songs only, and 5 like neither classical songs nor popular songs. If there are 39 selected constituents, how many constituents like both classical and popular songs?
34 sol: n(constituents)=39 n(classical)=34 n(popular)=0 n(class.and pop.)=? n(neither)= 39-34=5 so 5 did not like pop nor class. AND 34 is the mixture of constituents who like pop and classic so the answer is 34
