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Ex 12.1

Ex 12.1, 1

Ex 12.1, 2 Important You are here

Ex 12.1, 3

Ex 12.1, 4 Important

Ex 12.1, 5 Important

Ex 12.1, 6 (a)

Ex 12.1, 6 (b) Important

Ex 12.1, 6 (c)

Ex 12.1, 6 (d) Important

Ex 12.1, 7 (a) Important

Ex 12.1, 7 (b)

Ex 12.1, 7 (c) Important

Ex 12.1, 7 (d) Important

Ex 12.1, 8

Ex 12.1, 9

Ex 12.1, 10 Important

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Ex 12.1, 12 Important

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Ex 12.1, 15 Important

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Last updated at May 29, 2023 by Teachoo

Ex 12.1, 2 Out of 30 students in a class, 6 like football, 12 like cricket and remaining like tennis. Find the ratio of (a) Number of students liking football to number of students liking tennis. Total number of students = 30 Students liking football = 6 Students liking cricket = 12 Total number of students = Students like football + Students liking cricket + Students liking tennis 30 = 6 + 12 + Students liking tennis 30 = 18 + Students liking tennis Students liking tennis = 30 − 18 Students liking tennis = 12 Ratio = (𝑆𝑡𝑢𝑑𝑒𝑛𝑡𝑠 𝑙𝑖𝑘𝑖𝑛𝑔 𝑓𝑜𝑜𝑡𝑏𝑎𝑙𝑙)/(𝑆𝑡𝑢𝑑𝑒𝑛𝑡𝑠 𝑙𝑖𝑘𝑖𝑛𝑔 𝑡𝑒𝑛𝑛𝑖𝑠) = 6/12 = 1/2 ∴ Required ratio is 1 : 2 Ex 12.1, 2 Out of 30 students in a class, 6 like football, 12 like cricket and remaining like tennis. Find the ratio of (b) Number of students liking cricket to total number of students. Ratio = (𝑆𝑡𝑢𝑑𝑒𝑛𝑡𝑠 𝑙𝑖𝑘𝑖𝑛𝑔 𝑐𝑟𝑖𝑐𝑘𝑒𝑡)/(𝑇𝑜𝑡𝑎𝑙 𝑛𝑢𝑚𝑏𝑒𝑟 𝑜𝑓 𝑠𝑡𝑢𝑑𝑒𝑛𝑡𝑠) = 12/30 = 6/15 = 2/5 ∴ Required ratio is 2 : 5