Question 1 - Page 109 - Finding the Unknown - Chapter 5 Class 8 - Tales by Dots and Lines (Ganita Prakash II)

Transcript

Question 1 - Page 109 Coach Balwan noted down the weights of the kushti players (wrestlers) and the mean as shown. But one value that was written down got smudged. Can you find out the missing value?Let Missing value = x Thus, our data is 42, 40, 39, 33, 48, 38, 42, 35, 32, x Given Mean = 39.2 Finding Mean using formula Mean = (𝑆𝑢𝑚 𝑜𝑓 𝑎𝑙𝑙 𝑡𝑒𝑟𝑚𝑠)/(𝑁𝑢𝑚𝑏𝑒𝑟 𝑜𝑓 𝑡𝑒𝑟𝑚𝑠) 39.2 = (42 + 40 + 39 + 33 + 48 + 38 + 42 + 35 + 32 + 𝑥)/10 39.2 = (𝟑𝟒𝟗 + 𝒙)/𝟏𝟎 39.2 × 10 = 349 + x 392 = 349 + x 392 – 349 = x 43 = x x = 43 Thus, missing value is 43