Answer: 
Step-by-step explanation:
Let A = he known the answer then A' = he guess the answer.
B = he answered it correctly
As per given , we have



By Bayes theorem , we have

The probability that the student knows the answer given that he answered it correctly is
.
Answer:
x-3y ≥ -4
Step-by-step explanation:
It will take her 45 minutes to run 5 miles,because 27/3=9 and 9•5=45
The number of the product is 9