Posted by **Shian** on Sunday, September 25, 2011 at 1:51pm.

In a group of 40 students, all students study maths, 28 study biology and math, 20 students study geography and maths and x students study all three subjects.

a. Draw a venn diagram to represent the information above, showing in terms of x, the number of students in each subset

b. Determine the number of students who study all three subjects.

Help me please!!

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