Poison


Evaluate this limit.

Next, solve this question:

A typist makes about 1 error in 200 words. What is the probability that he types the 1st 2500 word without error?

8 comments:

  1. AnujSeptember 4, 2011 at 10:33 AM

    its not really that tough.
    1)expand nCr
    2)try replacing 'p' by n/alpha.
    3)note that 'r' is small as compared to 'n'.

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  2. MayankSeptember 4, 2011 at 4:21 PM

    (alpha^r)e^(-alpha)/r! ?

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  3. RohinSeptember 5, 2011 at 12:09 AM

    nice question.trying to work it out.just 1 small thing I'm eager to know-

    what is the significance of poison written at the top? :P

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  4. AnujSeptember 5, 2011 at 5:39 PM

    poison means Poisson.

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  5. RohinSeptember 6, 2011 at 5:41 PM

    probability question- (199/200)^2500?

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  6. AnujSeptember 7, 2011 at 6:00 PM

    @rohin:

    try using Mayank's limit expression to approximate your answer.

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  7. RohinSeptember 7, 2011 at 9:58 PM

    yes i got the answer to 1st part.got same as him.

    ReplyDelete
  8. UnknownMay 13, 2013 at 12:21 AM

    1st part, 1/r!

    ReplyDelete

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