Dhruba Dasgupta
10 years ago

In the library there are 8 books by stephen covey and one book by vinay singh in shelf A.At the same time there are 5 books by stephen covey in shelf B.One book is moved from shelf A to shelf B.A student picks up a book from shelf B.Find the probability that the book is by Vinay Singh.

1.is still in shelf A
2.is in shelf B
3.is taken by a student


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Comments (1)

  1. Anu Rag
    Anu Rag:
    5 years ago

    1. If Vinay singh book is still there in shelf A means stephan book is moved so the probability of moving stephan book is 8/9
    2. Vinay singh book is moved to shelf b and book is picked 1/9 * 5/6 = 5/54 ( probability of moving vinay book and picking stephan book in shelf B)

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