In a class 16 students do geography 18 do chemistry 5 do both and 3 do neither.how many students are in the class
5 answers
x=16+18+5+3=42 :x=42
No,
the 5 that do both are counted in the 16 geography students, AND the 18 chemistry students, so you are counting them twice
number of students = 16+18 - 5 + 3 = ....
make a Venn diagram to see.
the 5 that do both are counted in the 16 geography students, AND the 18 chemistry students, so you are counting them twice
number of students = 16+18 - 5 + 3 = ....
make a Venn diagram to see.
32
It very nice
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