Passage:
The adjoining histogram shows the frequency distribution of the ages of 20 teachers in a school. Based on the histogram, choose the correct option for each question.
The number of teachers in the age group 20 to 40 is
Answer & explanation
Correct answer: option 3
The correct answer is Option (3) → 8
The age group 20 to 40 is made of two classes, 20-30 and 30-40, so their bar heights are added.
Age group 20-30: 3 teachers
Age group 30-40: 5 teachers
Age group 20-40: \(3+5=8\) teachers