Answer:
∠x = 67°
Step-by-step explanation:
∠x = 67° because they both are inscribed angles of the same arc
Answer:
You are missing some of the equation my dude
Step-by-step explanation:
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.