Answer: 8:9
Step-by-step explanation:
Answer:
-2
Step-by-step explanation:
remove 3 from 1 and are left with negative 2
No a polygon only has 3 sides and 3 angles.
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.