Q85 of 91 Page 72

Below is a list of 10 tallest buildings in India. This list ranks buildings in India that stand at least 150m (492 ft.) tall, based on standard height measurement. This includes spires and architectural details but does not include antenna marks. Following data is given as per the available information till 2009. Since new buildings are always under construction, go on-line to check new taller buildings.

Use the information given in the table about sky scrapers to answer the following questions:



A. Find the height of each storey of the three tallest buildings and write them in the following table:



B. The average height of one storey for the buildings given in (a) is ___________.


C. Which city in this list has the largest percentage of skyscrapers? What is the percentage?


D. What is the range of data?


E. Find the median of the data.


F. Draw a bar graph for given data.

(A)


(B) Average height of 1 storey =


Sum of all 3 heights of each storey


= 4.15 + 4.15 + 3.93 = 12.23


Average = = 4.076


(C) the city with maximum skyscrapers is Mumbai


Percentage =


Percentage = = 90%


(D) Range = Maximum height – lowest height


= 249m-156


= 93m


(E) For median arrange heights in ascending order


156,170,170,170,180,181,184,193,249,249


Median of even number terms is mean of and term


Median of even number terms is mean of 5thand 6th term


Median = mean of 180 and 181


Median = = 180.5


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86

The marks out of 100 obtained by Kunal and Soni in the Half Yearly Examination are given below:


A. Draw a double bar graph by choosing appropriate scale.


B. Calculate the total percentage of marks obtained by Soni.


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87

The students of Class VII have to choose one club from Music, Dance, Yoga, Dramatics, Fine arts and Electronics clubs. The data given below shows the choices made by girls and boys of the class. Study the table and answer the questions that follow:


A. Draw a double bar graph using appropriate scale to depict the above data.


B. How many students are there in Class VII?


C. Which is the most preferred club by boys?


D. Which is the least preferred club by girls?


E. For which club the difference between boys and girls is the least?


F. For which club is the difference between boys and girls the maximum?