SOLUTION: Please help me out in solving this question: {{{ in a class of 160 pupils 75 have pencil, 87 have biro and 93 have ruler 25 have pencil and biro, 30 have both pencil and ruler,47 h

Algebra ->  Real-numbers -> SOLUTION: Please help me out in solving this question: {{{ in a class of 160 pupils 75 have pencil, 87 have biro and 93 have ruler 25 have pencil and biro, 30 have both pencil and ruler,47 h      Log On


   

Question 930570: Please help me out in solving this question:
Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!
in a class of 160 pupils 75 have pencil, 87 have biro and 93 have ruler 25 have pencil and biro, 30 have both pencil and ruler,47 have both biro and ruler
each have at least one of the three items 160-67-86+ = 7
Find the number of pupil that have both pencil and ruler only,
how many pupils have exactly 2 of the items,
how many pupils have exactly 1 of the item
....
Hope this Helps
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