In a survey of 100 students in an institution in Nigeria, 80 students speak Hausa and 20 students speak Igbo. 9 students speak both Hausa and Igbo.
How many students speak either Hausa or Igbo?
To find the number of students who speak either Hausa or Igbo, we can add the number of students who speak Hausa and the number of students who speak Igbo, and then subtract the number of students who speak both.
Number of students who speak Hausa = 80
Number of students who speak Igbo = 20
Number of students who speak both = 9
Therefore, the number of students who speak either Hausa or Igbo = 80 + 20 - 9 = 91.
Hence, 91 students speak either Hausa or Igbo.