(a) How many students have height more than or equal to 135 cm but less than 150 cm?
By observing the given histogram,
Students have height more than or equal to 135 cm but less than 150 = 14 + 18 + 10
= 42
(b) Which class interval has the least number of students?
150 – 155 has the least number of students i.e. 4.
(c) What is the class size?
The difference between the upper and lower limit of a class interval is called the
Size of the class interval.
Size = Upper limit – Lower limit
= 130 – 125
= 5
(d) How many students have height less than 140 cm?
By observing the given histogram,
Students have height less than 140 cm = 6 + 8 + 14
= 28
