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  1. Chapter 13 Class 8 Direct and Inverse Proportions
  2. Serial order wise

Transcript

Ex 13.2, 2 In a Television game show, the prize money of Rs 1,00,000 is to be divided equally amongst the winners. Complete the following table and find whether the prize money given to an individual winner is directly or inversely proportional to the number of winners? Given, Total prize money = ₹ 1, 00, 000 This prize money is distributed equally amongst the winners. ∴ Prize for each winner = (𝑻𝒐𝒕𝒂𝒍 𝒑𝒓𝒊𝒛𝒆 𝒎𝒐𝒏𝒆𝒚)/(𝑵𝒖𝒎𝒃𝒆𝒓 𝒐𝒇 𝒘𝒊𝒏𝒏𝒆𝒓𝒔) Prize for each winner = (100, 000)/(𝑁𝑢𝑚𝑏𝑒𝑟 𝑜𝑓 𝑤𝑖𝑛𝑛𝑒𝑟𝑠) If Number of Winners = 4 Prize for each winner = (100, 000)/(𝑁𝑢𝑚𝑏𝑒𝑟 𝑜𝑓 𝑤𝑖𝑛𝑛𝑒𝑟𝑠) = (100, 000)/4 = 100/4×1000 = 25×1000 = 25000 ∴ Each winner will be given ₹ 25,000 If Number of Winners = 8 Prize for each winner = (100, 000)/(𝑁𝑢𝑚𝑏𝑒𝑟 𝑜𝑓 𝑤𝑖𝑛𝑛𝑒𝑟𝑠) = (100, 000)/8 = 12,500 ∴ Each winner will be given ₹ 12,500 If Number of Winners = 10 Prize for each winner = (100, 000)/(𝑁𝑢𝑚𝑏𝑒𝑟 𝑜𝑓 𝑤𝑖𝑛𝑛𝑒𝑟𝑠) = (100, 000)/10 = 10,000 ∴ Each winner will be given ₹ 10,000 If Number of Winners = 20 Prize for each winner = (100, 000)/(𝑁𝑢𝑚𝑏𝑒𝑟 𝑜𝑓 𝑤𝑖𝑛𝑛𝑒𝑟𝑠) = (100, 000)/20 = 5,000 ∴ Each winner will be given ₹ 5,000 Thus, our table looks like Thus, our table looks like We can see that As number of winners increases, Prize for each winner is decreases. ∴ They are in inverse proportion

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Davneet Singh
Davneet Singh is a graduate from Indian Institute of Technology, Kanpur. He has been teaching from the past 8 years. He provides courses for Maths and Science at Teachoo. You can check his NCERT Solutions from Class 6 to 12.