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  1. Chapter 15 Class 9 Probability
  2. Serial order wise
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Ex 15.1, 13 In Q.1, Exercise 14.2, you were asked to prepare a frequency distribution table regarding the blood groups of 30 students of a class. Use this table to determine the probability that a student of this class, selected at random, has blood group AB. Total number of students = 30 Number of students with Blood group AB = 2 Probability = (๐‘๐‘ข๐‘š๐‘๐‘’๐‘Ÿ ๐‘œ๐‘“ ๐‘ ๐‘ก๐‘ข๐‘‘๐‘’๐‘›๐‘ก๐‘  ๐‘ค๐‘–๐‘กโ„Ž ๐‘๐‘™๐‘œ๐‘œ๐‘‘ ๐‘”๐‘Ÿ๐‘œ๐‘ข๐‘ ๐ด๐ต)/(๐‘‡๐‘œ๐‘ก๐‘Ž๐‘™ ๐‘›๐‘ข๐‘š๐‘๐‘’๐‘Ÿ ๐‘œ๐‘“ ๐‘ ๐‘ก๐‘ข๐‘‘๐‘’๐‘›๐‘ก๐‘ ) = 3/30 = 1/10

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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.