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Example 8 - A box contains 3 blue, 2 white and 4 red marbles - Bag/ Box / Piggy bank

  1. Chapter 15 Class 10 Probability
  2. Serial order wise
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Example 8 A box contains 3 blue, 2 white, and 4 red marbles. If a marble is drawn at random from the box, what is the probability that it will be (i) white? Total number of marbles = 3 + 2 + 4 = 9 Number of marbles which are white = 2 P(marble taken out is white) = (๐‘๐‘ข๐‘š๐‘๐‘’๐‘Ÿ ๐‘œ๐‘“ ๐‘š๐‘Ž๐‘Ÿ๐‘๐‘™๐‘’๐‘  ๐‘คโ„Ž๐‘–๐‘โ„Ž ๐‘Ž๐‘Ÿ๐‘’ ๐‘คโ„Ž๐‘–๐‘ก๐‘’)/(๐‘‡๐‘œ๐‘ก๐‘Ž๐‘™ ๐‘›๐‘ข๐‘š๐‘๐‘’๐‘Ÿ ๐‘œ๐‘“ ๐‘š๐‘Ž๐‘Ÿ๐‘๐‘™๐‘’๐‘ ) = 2/9 Example 8 A box contains 3 blue, 2 white, and 4 red marbles. If a marble is drawn at random from the box, what is the probability that it will be (ii) blue? Total number of marbles = 9 Number of marbles which are blue = 3 P(marble taken out is blue) = (๐‘๐‘ข๐‘š๐‘๐‘’๐‘Ÿ ๐‘œ๐‘“ ๐‘š๐‘Ž๐‘Ÿ๐‘๐‘™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‘š๐‘Ž๐‘Ÿ๐‘๐‘™๐‘’๐‘ ) = 3/9 = 1/3 Example 8 A box contains 3 blue, 2 white, and 4 red marbles. If a marble is drawn at random from the box, what is the probability that it will be (iii) red? Total number of marbles = 9 Number of marbles which are red = 4 P(marble taken out is red) = (๐‘๐‘ข๐‘š๐‘๐‘’๐‘Ÿ ๐‘œ๐‘“ ๐‘š๐‘Ž๐‘Ÿ๐‘๐‘™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‘š๐‘Ž๐‘Ÿ๐‘๐‘™๐‘’๐‘ ) = 4/9

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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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