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kamerin46
04.01.2020 •
Mathematics
Suppose the newspaper states that the probability of rain today is 65%.
what is the complement of the event "rain today"?
rain yesterday
rain tomorrow
no rain today
no rain tomorrow
what is the probability of the complement?
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Ответ:
no rain today = 35%
Step-by-step explanation:
In probability, the Complement Rule states that the sum of the probability of an event and its complement must = 1
i.e
P( Event) + P (Complement) = 1
In this sense, we can think of the complement of an event as the "not-event". I.e the event does not happen.
In our case, the event = "rain today",
hence the complement will be = "not rain today" (i.e no rain today)
using the formula above, we are given that P(rain today) = 65% = 0.65
hence
0.65 + P(Complement) = 1
P(Complement) = 1 - 0.65 = 0.35 = 35%
Ответ:
(3/5)(20)=12(x)
Step-by-step explanation: