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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

Ex 12.1, 11

Ex 12.1, 12 Important

Ex 12.1, 13 Important

Ex 12.1, 14

Ex 12.1, 15 Important

Ex 12.1, 16 Important

Last updated at March 30, 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