Answer:
4 study all 3 because the number 4 is in all the sciences at the same time so 4 students study all the sciences.
1 (biology and physics) + 4(just physics) + 8(physics and chemistry) + 4 (study all the sciences) = 1 + 4 + 8 + 4 = 17
17 study physics
Biology has 5 (just biology) + 1 (biology and physics) + 4 (every science) + 3 (biology and chemistry) + 9 (just chemistry) + 8 (physics and chemistry) = 5 + 1 + 4 + 3 + 9 + 8 = 30 students
30 students study biology or chemistry
Total students
Add all the numbers (including the 2 at the side)
5 + 1 + 4 + 3 + 4 + 8 + 9 + 2 = 36 students
Hope this helps
Explanation: