Answer:
The total account balance would be $454.50
Step-by-step explanation:
A) x + y = 17
B) x - y = 27
Adding both equations:2x = 44
x = 22
y = -5
I’m not sure but I’m commenting Bc I really need an answer I’m so sorry
Answer: 0.9730
Step-by-step explanation:
Let A be the event of the answer being correct and B be the event of the knew the answer.
Given:
If it is given that the answer is correct , then the probability that he guess the answer
By Bayes theorem , we have
Hence, the student correctly answers a question, the probability that the student really knew the correct answer is 0.9730.