The given histogram shows the height of the students. The difference between the number of students whose height is between 150-155 cm and the number of students whose height lies between 175-180 cm is:

8 9 3 7

9

Number of Students height b/w 150 - 155cm = 15 Number of students b/w 175 - 180 cm = 6 Required Difference = 15 - 6 = 9cm