DAV Class 7 Maths Chapter 12 Worksheet 4
Data Handling Worksheet 4
1. A bicycle shop owner sold the folowing number of bicycles each day in a particular week. Present this information in the form of a bar graph. \[ \color{black} \begin{array}{|c|c|c|c|c|c|} \hline \text{Day} & Monday & Tuesday & Wednesday & Thursday & Friday & Saturday \\ \hline \text{No. of cycles sold} & 35 & 30 & 44 & 25 & 10 &25 \\ \hline \end{array} \]
Solution
2. The number of adults in a vilage according to their level of education is given in the bar graph below.
(a) What does the bar graph represent?
Answer The bar graph represent the number of adults in a vilage according to their level of education.
(b) How many uneducated adults are there?
Answer \( \color{red}1100\)
(c) How many adults are educated up to (i) Primary Level (ii) High School Level?
Answer(i) \( \color{red}900\) (ii) \( \color{red}700\)
3. Draw bar graph for the following data. \[ \color{black} \begin{array}{|c|c|c|c|c|c|} \hline \text{Month} & March & April & May & June & July \\ \hline \text{Highest Temp. (°C)} & 32° & 36° & 41° & 45° & 43° \\ \hline \end{array} \]
Solution
4. Study the bar graph and answer the questions that follow.
(a) What does the bar graph represent?
Answer The bar graph represent the number of boys and girls of class 7 of DAV public school.
(b) In which two sections are the number of girls equal?
Answer \( \color{red}7A\) and \( \color{red}7D\)
(c) Which section has the highest number of girls?
Answer \( \color{red}7B\)
(d) How many sections have more number of girls than boys?
Answer \( \color{red}2\)
5. The following data gives the number of Mathematics and Science books purchased by a library during different years. \[ \color{black} \begin{array}{|c|c|c|c|c|c|} \hline \text{Year} & 2009 & 2010 & 2011 & 2012 & 2013 \\ \hline \text{Mathematics} & 350 & 400 & 520 & 600 & 650 \\ \hline \text{Science} & 300 & 380 & 400 & 450 & 600 \\ \hline \end{array} \] Draw a double bar graph.
Solution
6. The following data gives the maximum and minimum temperature (in °C) of the cities on a particular day. Plot a double bar graph from this data and answer the questions.
\[ \color{brown} \begin{array}{|c|c|c|c|c|c|} \hline \text{City} & Delhi & Bengaluru & Srinagar & Mumbai & Chennai \\ \hline \text{Maximum Temp. (°C)} & 23 & 20 & 10 & 30 & 32 \\ \hline \text{Minimum Temp. (°C)} & 20 & 19 & 4 & 28 & 27 \\ \hline \end{array} \]
Bar graph
Answer
(a) Which city shows the maximum difference in day's temperature?
Answer \( \color{red}Srinagar\)
(b) Which city shows the minimum difference in day's temperature?
Answer \( \color{red}Bengaluru\)
(c) Which are the hottest and the coldest cities?
AnswerHottest city - \( \color{red}Chennai\), Coldest city - \( \color{red}Srinagar\)