NCERT Exemplar Solutions
Class 7 - Mathematics - Unit 3: Data Handling - Problems and SolutionsQuestion 79
Class 7 - Mathematics - Unit 3: Data Handling - Problems and Solutions
Question. 79
Study the double bar graph given below and answer the questions that follow:
(a) What information is compared in the above given double bar graph?
(b) Calculate the ratio of minimum temperatures in the year 2008 to the year 2009 for the month of November.
(c) For how many months was the minimum temperature in the year 2008 greater than that of year 2009? Name those months.
(d) Find the average minimum temperature for the year 2008 for the four months.
(e) In which month is the variation in the two temperatures maximum?
Answer:
(a) Comparison of minimum temperature during Nov–Feb for 2008 and 2009
(b) 18:15 or 6:5
(c) Two: February and November
(d) 11.25
(e) February
Detailed Answer with Explanation:
Values read from the graph: Nov(18,15), Dec(11,12), Jan(5,4), Feb(12,8). Calculations as per formula.