18 19 O 18-1/4 O 1/4" 1-1/4
1 answer:
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Answer:
Step-by-step explanation:
We could use the Slope Formula to find the answer, but there's an easier way of doing it. Notice that the y-coordinates of both points are the same. This means that the line that passes through these points is horizontal, which makes our answer because all horizontal lines have a slope of
.
All horizontal lines have a slope of because the value of y never changes as the value of x changes, so if we were to input any two points on a horizontal line into the Slope Formula, our numerator would be
(because anything subtracted from itself is
), leaving us with a result of
regardless of the denominator since
divided by anything is
. Hope this helps!
Answer:
0.1739 = 17.39% probability that the cab actually was blue
Step-by-step explanation:
Conditional Probability
We use the conditional probability formula to solve this question. It is
In which
P(B|A) is the probability of event B happening, given that A happened.
is the probability of both A and B happening.
P(A) is the probability of A happening.
In this question:
Event A: Witness asserts the cab is blue.
Event B: The cab is blue.
Probability of a witness assessing that a cab is blue.
20% of 95%(yellow cab, witness assesses it is blue).
80% of 5%(blue cab, witness assesses it is blue). So
Probability of being blue and the witness assessing that it is blue.
80% of 5%. So
What is the probability that the cab actually was blue?
0.1739 = 17.39% probability that the cab actually was blue