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Hi
I have a quant questions, which I would like to know the way to solve. Perhaps, the questions have already been asked, but still, your replies are helpful. Thanks.
Q1. On saturday morning, John will begin a camping vacation and will return home at the end of the first day on which it rains. If on the first 3 days of the vacation the probability of rain on each day is 0.2, what is the probability that John 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
Official answer is b.
Regards
I have a quant questions, which I would like to know the way to solve. Perhaps, the questions have already been asked, but still, your replies are helpful. Thanks.
Q1. On saturday morning, John will begin a camping vacation and will return home at the end of the first day on which it rains. If on the first 3 days of the vacation the probability of rain on each day is 0.2, what is the probability that John 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
Official answer is b.
Regards
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20 May 2004, 05:03
Kudos
Bookmarks
Q1. On saturday morning, John will begin a camping vacation and will return home at the end of the first day on which it rains. If on the first 3 days of the vacation the probability of rain on each day is 0.2, what is the probability that John 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
ANS:
LET THINK IN THIS WAY
FIRST DAY IT WAS NO RAIN
SECOND DAY NO RAIN
THIRD DAY - RAIN
SO PROBABILITY FOR THOSE
FIRST DAY - NO RAIN = 1 - 0.2 = 0.8
SECOND DAY - NO RAIN = 1 - 0.2 = 0.8
THIRD DAY - NO RAIN = 0.2
TOTAL PROBABILTY = 0.128
a. 0.008
b. 0.128
c. 0.488
d. 0.512
e. 0.640
ANS:
LET THINK IN THIS WAY
FIRST DAY IT WAS NO RAIN
SECOND DAY NO RAIN
THIRD DAY - RAIN
SO PROBABILITY FOR THOSE
FIRST DAY - NO RAIN = 1 - 0.2 = 0.8
SECOND DAY - NO RAIN = 1 - 0.2 = 0.8
THIRD DAY - NO RAIN = 0.2
TOTAL PROBABILTY = 0.128
20 May 2004, 05:06
Kudos
Bookmarks
hello carsen
i have a request. try to post one question per thread. it is easy for the members to discuss. its not a big problem , just letting you know
sincerely
praet
i have a request. try to post one question per thread. it is easy for the members to discuss. its not a big problem , just letting you know
sincerely
praet
