Sunday, June 17, 2007

GRE QUESTION ON DEMAND

An experiment has three possible outcomes, l, J, and
K. The probabilities of the outcomes are 0.25, 0.35,
and 0.40, respectively. If the experiment is to be
performed twice and the successive outcomes are
independent, what is the probability that K will not
be an outcome either time?
(A) 0.36
(B) 0.40
(C) 0.60
(D) 0.64
(E) 0.80

BY-- AJAY KUMAR SINGH from DELHI
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8 comments:

  1. AnonymousJune 17, 2007 at 12:34 PM

    a

    ReplyDelete
  2. AnonymousJune 18, 2007 at 6:29 PM

    a

    ReplyDelete
  3. AnonymousJune 19, 2007 at 9:53 PM

    C

    ReplyDelete
  4. Manisha ReddyJune 19, 2007 at 10:05 PM

    need's an explanation

    ReplyDelete
  5. UnknownJune 21, 2007 at 6:54 AM

    please can yu post answers also..

    ReplyDelete
  6. AnonymousJune 21, 2007 at 7:33 PM

    (1-.4)(1-.4) = .36 A

    ReplyDelete
  7. AnonymousSeptember 4, 2008 at 7:55 AM

    (1-,4)(1-,4)= .36 so A is correct answer

    ReplyDelete
  8. sunnyApril 12, 2009 at 3:48 AM

    hERE THE EVENTS ARE INDEPENDENT SO WE NEED TO DO ADDITION .
    THE PROBBILITY OF NOT GETTING K IS PROBABILITY OF GETTING I and j which is respectively 0.25 and 0.25. so for both the time the probability fo getting i and j is
    2(0.25)+2(0.35)=0.50+0.70+1.20/2=0.60.

    ReplyDelete