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jwbri
19.11.2019 •
Mathematics
let events a and b be described as follows:
p(a) = doing yard work
p(b) = it raining
the probability that it will rain this weekend is 68% the probability of doing yard work this weekend and it raining is 15%. if the probability of doing yard work is 53%, are doing yard work and it raining independent?
a. yes, because p(a | b) = 0.22 and the p(a) = 0.53are not equal.
b. no, because p(a| b) = 0.28 and the p(b) = 0.68 are not equal.
c. yes, because because p(a| b) = 0.28 and the p(b) = 0.68 are not equal.
d. no, because p(a | b) = 0.22 and the p(a) = 0.53are not equal.
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Ответ:
D. No, because
and the
are not equal.
Step-by-step explanation:
Given:
Probability of doing yard work is,![P(A)=53\%=0.53](/tpl/images/0381/5817/050f4.png)
Probability of raining,![P(B)=68\%=0.68](/tpl/images/0381/5817/34654.png)
Probability of doing yard work and it raining is,![P(A\cap B)=15\%=0.15](/tpl/images/0381/5817/86e83.png)
Now, two events A and B are independent if,
Conditional probability of event A given that B has occurred is given as:
So,![P(A|B)=0.22\ and\ P(A)=0.53](/tpl/images/0381/5817/4b511.png)
Since,
, A and B are not independent events.
Ответ:
Table C
Step-by-step explanation:
When graphed, it passes vertical line test.