Q7 of 41 Page 5

Given below is the frequency distribution of the heights of 50 students of a class:

Draw a histogram representing the above data.


We have drowned the histogram by using the class-interval and frequency given in the question. The hight of the rectangle in the histogram shows the frequencies of class intervals.

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5

Themarks obtained by 40 students of class VIII in an examination are given below :

16, 17, 18, 3, 7, 23, 18, 13, 10, 21, 7, 1, 13, 21, 13, 15, 19, 24, 16, 3, 23, 5, 12, 18, 8, 12, 6, 8, 16, 5, 3, 5, 0, 7, 9, 12, 20, 10, 2, 23.


Divide the data into five groups namely 0-5, 5-10, 10-15, 15-20 and 20-25 and prepare a grouped frequency table.

 6

A coin is tossed 200 times and head appeared 120 times. Find the probability of getting a head in this experiment.

 8

A bag contains 5 white and 7 red balls. One ball is drawn at random. What is the probability that ball drawn is white?

 9

The following pie chart gives the distribution of constituents in the human body. Find the central angle of the sector showing the distribution of protein and other constituents.