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

Question 1151151: 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 chewers

Answer by ikleyn(52780) (Show Source): You can put this solution on YOUR website!
.


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

Solved, answered and completed.

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- Counting elements in sub-sets of a given finite set
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