Find the number of students whose height is greater than or equal to 135 cm but less than 150 cm.
42
The following data can be obtained from the graph:
135-140 cm - 14 students
140-145 cm - 18 students
145-150 cm - 10 students
Therefore, number of students whose height is greater than or equal to 135 cm but less than 150 cm is
=14+18+10
=42