From the graph given below, answer the following questions.
The number of people owning books more than 20 but less than 60 is
Answer & explanation
Correct answer: option 3
The correct answer is Option (3) → 30
“More than 20 but less than 60 books” covers two classes of the histogram, 20–40 and 40–60, so the heights of these two bars are added.
20–40 books: 16 people
40–60 books: 14 people
Total \(=16+14=30\)
The 16 in Option (2) is only the first of the two bars, and 14 in Option (1) only the second.