NCERT Exemplar Solutions
Class 7 - Mathematics - Unit 7: Comparing Quantities - Problems and SolutionsQuestion 138
Class 7 - Mathematics - Unit 7: Comparing Quantities - Problems and Solutions
Question. 138
Earth Science: Refer table of world’s largest deserts. Answer:
(a) What are the mean, median and mode of the areas listed?
(b) How many times the size of the Gobi Desert is the Namib Desert?
(c) What percentage of deserts listed are in Asia?
(d) What percentage of total area is in Asia?
Answer:
(a) Mean = 14,35,000 km², Median = 4,75,000 km², Mode = 3,10,000 km².
(b) 4.19 times.
(c) 50%.
(d) 21.1%.
Detailed Answer with Explanation:
Each desert’s area was used for mean, median, mode. Ratio of Gobi to Namib = 13,00,000 ÷ 3,10,000 ≈ 4.19. 5 out of 10 are in Asia = 50%. Asia’s total ÷ total area × 100 = 21.1%.