NCERT Exemplar Solutions
Class 7 - Mathematics - Unit 3: Data Handling - Problems and SolutionsQuestion 78
Class 7 - Mathematics - Unit 3: Data Handling - Problems and Solutions
Question. 78
Study the double bar graph shown below and answer the questions that follow:
(a) What information is represented by the above double bar graph?
(b) In which month sales of Brand A decreased as compared to the previous month?
(c) What is the difference in sales of both the Brands for the month of June?
(d) Find the average sales of Brand B for the six months.
(e) List all months for which the sales of Brand B was less than that of Brand A.
(f) Find the ratio of sales of Brand A as compared to Brand B for the month of January.
Answer:
(a) Comparison of sales of Brand A and Brand B during the month of January to June
(b) March
(c) 3 Lakh
(d) 41.8 Lakh
(e) April, June
(f) 31:36
Detailed Answer with Explanation:
(a) Shows monthly sales of two brands.
(b) Jan=31→Feb=34→Mar=30 (decrease).
(c) June: Brand A=57, Brand B=54 → diff=3.
(d) Avg=251/6≈41.8.
(e) In April (40 vs 35) and June (57 vs 54), Brand B < Brand A.
(f) Ratio Jan=31:36.