WAEC - Mathematics (1989 - No. 15)
The venn diagram below shows the number of students who studied Physics, Chemistry, and Mathematics in a certain school. How many students took at least two of the three subjects?
165
160
155
135
85
הֶסבֵּר
At least 2 subjects = 30 + 45 + 75 + 10 = 160 students