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Nakul jha
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Asked: 2020-10-29T05:55:31+00:00 In:

12 defective pens are accidentally mixed with 132 good ones. It is not possible to just look at a pen and tell whether or not it is defective. One pen is taken out at random from this lot. Determine the probability that the pen taken out is a good one.

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NCERT Solutions for Class 10 Maths Chapter 15
Important NCERT Questions
PROBABILITY
NCERT Books for Session 2022-2023
CBSE Board and UP Board Others state Board
EXERCISE 9.1
Page No:309
Questions No:16

2020-2021cbsechapter 15class10mathematicsncertprobability
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    2 Answers

    1. Best Answer

      Total number of pens = 12 + 132 = 144
      Total number of good pens = 132
      P(getting a good pen) = (Number of favourable outcomes)/(Number of total possible outcomes) = 132/144 = 11/12

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    2. Get Hindi Medium and English Medium NCERT Solution for Class 10 Maths to download.
      Please follow the link to visit website for first and second term exams solutions.
      https://www.tiwariacademy.com/ncert-solutions/class-10/maths/chapter-15/

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