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Example 2 - A bag contains a red ball, blue ball and yellow - Bag/ Box / Piggy bank

  1. Chapter 15 Class 10 Probability
  2. Serial order wise
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Example 2 A bag contains a red ball, a blue ball and a yellow ball, all the balls being of the same size. Kritika takes out a ball from the bag without looking into it. What is the probability that she takes out the yellow ball? Total number of balls = 3 Number of balls which are yellow = 1 P(ball taken out yellow) = (๐‘๐‘ข๐‘š๐‘๐‘’๐‘Ÿ ๐‘œ๐‘“ ๐‘๐‘Ž๐‘™๐‘™๐‘  ๐‘คโ„Ž๐‘–๐‘โ„Ž ๐‘Ž๐‘Ÿ๐‘’ ๐‘ฆ๐‘’๐‘™๐‘™๐‘œ๐‘ค)/(๐‘‡๐‘œ๐‘ก๐‘Ž๐‘™ ๐‘›๐‘ข๐‘š๐‘๐‘’๐‘Ÿ ๐‘œ๐‘“ ๐‘๐‘Ž๐‘™๐‘™๐‘ ) = 1/3 Example 2 A bag contains a red ball, a blue ball and a yellow ball, all the balls being of the same size. Kritika takes out a ball from the bag without looking into it. What is the probability that she takes out the (ii) red ball? Total number of balls = 3 Number of balls which are red = 1 P(ball taken out red) = (๐‘๐‘ข๐‘š๐‘๐‘’๐‘Ÿ ๐‘œ๐‘“ ๐‘๐‘Ž๐‘™๐‘™๐‘  ๐‘คโ„Ž๐‘–๐‘โ„Ž ๐‘Ž๐‘Ÿ๐‘’ ๐‘Ÿ๐‘’๐‘‘)/(๐‘‡๐‘œ๐‘ก๐‘Ž๐‘™ ๐‘›๐‘ข๐‘š๐‘๐‘’๐‘Ÿ ๐‘œ๐‘“ ๐‘๐‘Ž๐‘™๐‘™๐‘ ) = 1/3 Example 2 A bag contains a red ball, a blue ball and a yellow ball, all the balls being of the same size. Kritika takes out a ball from the bag without looking into it. What is the probability that she takes out the (iii) blue ball? Total number of balls = 3 Number of balls which are blue = 1 P(ball taken out blue) = (๐‘๐‘ข๐‘š๐‘๐‘’๐‘Ÿ ๐‘œ๐‘“ ๐‘๐‘Ž๐‘™๐‘™๐‘  ๐‘คโ„Ž๐‘–๐‘โ„Ž ๐‘Ž๐‘Ÿ๐‘’ ๐‘๐‘™๐‘ข๐‘’)/(๐‘‡๐‘œ๐‘ก๐‘Ž๐‘™ ๐‘›๐‘ข๐‘š๐‘๐‘’๐‘Ÿ ๐‘œ๐‘“ ๐‘๐‘Ž๐‘™๐‘™๐‘ ) = 1/3

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Davneet Singh
Davneet Singh is a graduate from Indian Institute of Technology, Kanpur. He provides courses for Mathematics from Class 9 to 12. You can ask questions here.
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