I hope this helps you
V=pi.r^3.4/3
Answer:
90 points
Step-by-step explanation:
90 x .80 = 72 points
Answer: b = 1
Step-by-step explanation:
<u>Given</u>
6.8 - 4.2b = 5.6b - 3
<u>Add 4.2b on both sides</u>
6.8 - 4.2b + 4.2b = 5.6b - 3 + 4.2b
6.8 = 9.8b - 3
<u>Add 3 on both sides</u>
6.8 + 3 = 9.8b - 3 + 3
9.8 = 9.8b
<u>Divide 9.8 on both sides</u>
9.8 / 9.8 = 9.8b / 9.8
Hope this helps!! :)
Please let me know if you have any questions
Answer:
A) P(A|B) = 0.01966
B) P(A'|B') = 0.99944
Step-by-step explanation:
A) We are told that A is the event "the person is infected" and B is the event "the person tests positive".
Thus, using bayes theorem, the probability that the person is infected is; P(A|B)
From bayes theorem,
P(A|B) = [P(A) × P(B|A)]/[(P(A) x P(B|A)) + (P(A') x P(B|A'))]
Now, from the question,
P(A) = 1/400
P(A') = 399/400
P(B|A) = 0.8
P(B|A') = 0.1
Thus;
P(A|B) = [(1/400) × 0.8)]/[((1/400) x 0.8) + ((399/400) x (0.1))]
P(A|B) = 0.01966
B) we want to find the probability that when a person tests negative, the person is not infected. This is;
P(A'|B') = P(Not infected|negative) = P(not infected and negative) / P(negative) = [(399/400) × 0.9)]/[((399/400) x 0.9) + ((1/400) x (0.2))] = 0.99944