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Ex 7.1, 3 - Chapter 7 Class 8 Comparing Quantities

Last updated at July 21, 2023 by

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Ex 7.1, 3 72% of 25 students are good in mathematics. How many are not good in mathematics?Given, Total Students = 25 Percentage of Students good in mathematics = 72 % Now, Percentage of Students not good in mathematics = 100% โˆ’ 72% Percentage of Students not good in mathematics = 28% Finding number of students not good in mathematics Let Number of Students not good in Mathematics = x Percentage = (๐‘๐‘ข๐‘š๐‘๐‘’๐‘Ÿ ๐‘œ๐‘“ ๐‘ ๐‘ก๐‘ข๐‘‘๐‘’๐‘›๐‘ก๐‘  ๐‘›๐‘œ๐‘ก ๐‘”๐‘œ๐‘œ๐‘‘ ๐‘–๐‘› ๐‘š๐‘Ž๐‘กโ„Ž๐‘’๐‘š๐‘Ž๐‘ก๐‘–๐‘๐‘ )/(๐‘‡๐‘œ๐‘ก๐‘Ž๐‘™ ๐‘ ๐‘ก๐‘ข๐‘‘๐‘’๐‘›๐‘ก๐‘ ) ร— 100 28 = ๐’™/๐Ÿ๐Ÿ“ร—๐Ÿ๐ŸŽ๐ŸŽ 28 = ๐‘ฅ ร— 4 28/4 = x 7 = x x = 7 โˆด 7 Students are not good in mathematics

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Davneet Singh has done his B.Tech from Indian Institute of Technology, Kanpur. He has been teaching from the past 13 years. He provides courses for Maths, Science, Social Science, Physics, Chemistry, Computer Science at Teachoo.