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Dkumar · 2005 June 12th, 04:01 PM

Hi Brinda!
I get a different answer for your question.

On any day in April in a certain city, the probability of rain is 50%. What is the probability of that it rains exactly 5 days during a 7 day period in April?

Acc to my calculation,

Probability that it will rain in a any day is 1/2
Prabability that it will not rain is (1-1/2) = 1/2
Probability that it will rain exactly 5 days and will not rain the other two days = 1/2 *1/2*1/2*1/2*1/2*1/2*1/2 = 1/128

Please let me know the correct answer.
Thanks.

2005 June 12th, 04:01 PM	#21 (permalink)
Dkumar Within my grasp! Join Date: Jun 2005 Posts: 388	Re: one probability question Hi Brinda! I get a different answer for your question. On any day in April in a certain city, the probability of rain is 50%. What is the probability of that it rains exactly 5 days during a 7 day period in April? Acc to my calculation, Probability that it will rain in a any day is 1/2 Prabability that it will not rain is (1-1/2) = 1/2 Probability that it will rain exactly 5 days and will not rain the other two days = 1/2 1/21/21/21/21/21/2 = 1/128 Please let me know the correct answer. Thanks. _ _ _ _ SIG _ _ _ _ Dinesh