w+5=8 because 3+5=8 so
w+5=9 because we put w as 4
w +5=10 so w is 5
31 hope that helps have a good one
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.