In a school, students must take at least one of these subjects: Maths, Physics or Chemistry. In a group of 50 students, 7 take all three subjects, 9 take Physics and Chemistry only, 8 take Maths and Physics only and 5 take Maths and Chemistry only. Of these 50 students, x take Maths only, x take Physics only and x + 3 take Chemistry only. Draw a Venn diagram, find X i and hence find the number taking Maths.
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Venn diagram:
There are 50 students in a group.
Using Venn diagram, we have .
The number of students that take Maths is .
Answer: ; students take Maths.