

InterviewSolution
Saved Bookmarks
1. |
There are a total of 50 distinct books on a shelf such as 20 math books, 16 physics books, and 14 chemistry books. Find is the probability of getting a book that is not a chemistry book or not a physics book.(a) \(\frac{4}{17}\)(b) \(\frac{43}{50}\)(c) \(\frac{12}{31}\)(d) 1I got this question by my college professor while I was bunking the class.Enquiry is from Addition Theorem on Probability in chapter Discrete Probability of Discrete Mathematics |
Answer» RIGHT answer is (d) 1 Easiest explanation: The probability of not getting CHEMISTRY book = 1 – (probability of chemistry book) = 1 – \(\frac{14}{30} = \frac{16}{30}\) and the probability of not getting chemistry book = 1 – (probability of physics book) = 1 – \(\frac{16}{30} = \frac{14}{30}\). So, the required probability is = \(\frac{16}{30} + \frac{14}{30}\) = 1. |
|