Q90 of 116 Page 42

Look at the histogram below and answer the questions that follow.


(a) How many students have height more than or equal to 135 cm but less than 150 cm?


(b) Which class interval has the least number of students?


(c) What is the class size?


(d) How many students have height less than 140 cm?

(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


More from this chapter

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88

Study the pie chart given below depicting the marks scored by a student in an examination out of 540. Find the marks obtained by him in each subject.

 89

Ritwik draws a ball from a bag that contains white and yellow balls. The probability of choosing a white ball is . If the total number of balls in the bag is 36, find the number of yellow balls.

 91

Following are the number of members in 25 families of a village:

6, 8, 7, 7, 6, 5, 3, 2, 5, 6, 8, 7, 7, 4, 3, 6, 6, 6, 7, 5, 4, 3, 3, 2, 5.


Prepare a frequency distribution table for the data using class intervals 0 –2, 2 –4, etc.

 92

Draw a histogram to represent the frequency distribution in question 91.