In a survey of 100 students in an institution in Nigeria, 60 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 need to add the number of students who speak Hausa, the number of students who speak Igbo, and then subtract the number of students who speak both Hausa and Igbo (as they would have been counted twice).
Number of students who speak only Hausa = 60 - 9 = 51
Number of students who speak only Igbo = 20 - 9 = 11
Total number of students who speak either Hausa or Igbo = 51 (only Hausa) + 11 (only Igbo) + 9 (both) = 71
Therefore, 71 students speak either Hausa or Igbo.