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  1. Chapter 12 Class 6 Ratio And Proportion
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Ex 12.1, 1 There are 20 girls and 15 boys in a class. (a) What is the ratio of number of girls to the number of boys? Number of girls = 20 Number of boys = 15 Ratio = (๐‘๐‘ข๐‘š๐‘๐‘’๐‘Ÿ ๐‘œ๐‘“ ๐‘”๐‘–๐‘Ÿ๐‘™๐‘ )/(๐‘๐‘ข๐‘š๐‘๐‘’๐‘Ÿ ๐‘œ๐‘“ ๐‘๐‘œ๐‘ฆ๐‘ ) = 20/15 = 4/3 โˆด Required ratio is 4 : 3 Ex 12.1, 1 There are 20 girls and 15 boys in a class. (b) What is the ratio of number of girls to the total number of students in the class?Total number of students = Number of girls + Number of boys = 20 + 15 = 35 โˆด Ratio = (๐‘๐‘ข๐‘š๐‘๐‘’๐‘Ÿ ๐‘œ๐‘“ ๐‘”๐‘–๐‘Ÿ๐‘™๐‘ )/(๐‘‡๐‘œ๐‘ก๐‘Ž๐‘™ ๐‘๐‘ข๐‘š๐‘๐‘’๐‘Ÿ ๐‘œ๐‘“ ๐‘ ๐‘ก๐‘ข๐‘‘๐‘’๐‘›๐‘ก๐‘ ) = 20/35 = 4/7 โˆด Required ratio is 4 : 7

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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.