Question

In Sound Foundation High School there are 400 students in the final year, 300 0f them do biology, 150 do physics. How many of them do both subjects

Answer 1

50 students do both subjects

Explanation:

we take the total of the biology students and physics students minus the total number of them all. 300+150-400=50

Answer 2

(300 + 150) - 400 = 50 students do both biology and physics.