verbose123 Posted August 22, 2008 Share Posted August 22, 2008 On Saturday morning, Malachi will begin a camping vacation and he will return home at the end of the first day on which it rains. If on the first three days of the vacation the probability of rain on each day is 0.2, what is the probability that Malachi will return home at the end of the day on the following Monday? A. 0.008 B. 0.128 C. 0.488 D. 0.512 E. 0.640 will give you the OA, but please tell me the approach. Quote Link to comment Share on other sites More sharing options...
Storm Posted August 22, 2008 Share Posted August 22, 2008 .128? (.8 * .8 * .2) Quote Link to comment Share on other sites More sharing options...
samal Posted August 22, 2008 Share Posted August 22, 2008 He starts on saturday morning. So for him to return on Monday end of day, it should not rain on saturday and sunday, but it should rain on monday. Probability of raining is givien as 0.2. So probability of not raining is 0.8. Hence 0.8 * 0.8 * 0.2 = 0.128 Quote Link to comment Share on other sites More sharing options...
verbose123 Posted August 23, 2008 Author Share Posted August 23, 2008 ohhh great this was not that difficult.. thanks a lot. for the response guys. Quote Link to comment Share on other sites More sharing options...
bose Posted August 23, 2008 Share Posted August 23, 2008 .8*.8*.2 Quote Link to comment Share on other sites More sharing options...
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