SOLUTION: in a recent survay of 400 students in a school 100 were listed as smokers and 150 as chewers of gum,75 were disted as both smokers and and gum chewers. find out how many non gum ch

Algebra ->  sets and operations -> SOLUTION: in a recent survay of 400 students in a school 100 were listed as smokers and 150 as chewers of gum,75 were disted as both smokers and and gum chewers. find out how many non gum ch      Log On

From the condition, the number of those who EITHER smoke OR chew is


    100 + 150 - 75 = 175.


The rest, 400-175 = 225, are NEITHER smokers NOR gum chewers.    ANSWER