saxondear052
02.10.2019 •
Mathematics
Asurvey was taken of children between the ages of 3 and 7. let a be the event that the person has 2 siblings and let b be the event that the person does not have a pet.
which statement is true about whether a and b are independent events?
the table and answers to choose are shown in the picture
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Ответ:
answer:
option a is correct
step-by-step explanation:
a and b are independent events
p(a and b) = p(a) * p(b)
now we find
now we replace p(a and b)
cancel out p(b) at the top and bottom
so p(a|b)= p(a)
let a be the event that the person has 2 siblings and let b be the event that the person does not have a pet.
from the table we can see that probability that the person has 2 siblings given that the person does not have a pet is 18% that is 0.18
so p(a|b) = p(a) = 0.18
Ответ:
Ответ:
-12/72 or 0.1667
Step-by-step explanation: