so, did you make your diagram?
By the way, in classes students do not offer the subjects.
In a class of 40 students;30 offer science; 20 offer mathematics and 8 neither.
a.illustrate this information on a venn diagram .
b.how Many students offer both subjects.
c.how many students offer exactly one subject
3 answers
60
surely you can see that 60 is not an answer. There are only 40 students in all!
Since 8 students take neither, there are only 32 students to worry about.
If you count all the science and math, you get 50. But in doing that, you have counted twice the students who take both. That means that if there are x students who take both,
30+20-x = 32
x = 18
So, 18 students were counted twice because they take both subjects.
That means that 32-18 = 14 students take exactly one subject.
60! huh...
Since 8 students take neither, there are only 32 students to worry about.
If you count all the science and math, you get 50. But in doing that, you have counted twice the students who take both. That means that if there are x students who take both,
30+20-x = 32
x = 18
So, 18 students were counted twice because they take both subjects.
That means that 32-18 = 14 students take exactly one subject.
60! huh...
3 answers