Look at the histo

(a) Number of students who have height more than or equal to 135 cm but less than 150 cm = 14 + 18 + 10 = 42

(b) Class interval that has the least number of students = 150–155

(c) Class Size = Upper Limit – Lower Limit

⇒ Class Size = 130 – 125

⇒ Class Size = 5

(d) Students that have height less than 140 cm = 6 + 8 + 14 = 28