Answer:
A
False
Step-by-step explanation:
The answer is C
9 to 7 because a,b,d is equal to 7/9 but not c which is equal to 9/7
Answer:
0.8 = 80% probability that they did in fact study for the test.
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: Passed the exam.
Event B: Studied.
Probability of passing the test:
80% of 60%(Studied).
30% of 100 - 60 = 40%(did not study). So
![P(A) = 0.8*0.6 + 0.3*0.4 = 0.6](https://tex.z-dn.net/?f=P%28A%29%20%3D%200.8%2A0.6%20%2B%200.3%2A0.4%20%3D%200.6)
Probability of passing the test studying:
80% of 60%, so:
![P(A \cap B) = 0.8*0.6 = 0.48](https://tex.z-dn.net/?f=P%28A%20%5Ccap%20B%29%20%3D%200.8%2A0.6%20%3D%200.48)
Find the probability that they did in fact study for the test with this knowledge in hand.
![P(B|A) = \frac{P(A \cap B)}{P(A)} = \frac{0.48}{0.6} = 0.8](https://tex.z-dn.net/?f=P%28B%7CA%29%20%3D%20%5Cfrac%7BP%28A%20%5Ccap%20B%29%7D%7BP%28A%29%7D%20%3D%20%5Cfrac%7B0.48%7D%7B0.6%7D%20%3D%200.8)
0.8 = 80% probability that they did in fact study for the test.
Answer: See below
Step-by-step explanation:
A. 2.1 No (2.1>2)
B. -1 Yes
C. 0 Yes
D. -7.5 No (-7.5<-7)
E. 3.5 No (3.5>2)
F. -6.4 Yes
G. -8 No (-8<-7)
Answer:
66°
Step-by-step explanation:
∠x= ∠EJI= 105°- 39°= 66°