An algebra 2 test has 6 multiple choice questions with four choices with one correct answer each. If we just randomly guess on each of the 6 questions, what is the probability that you get exactly 3 questions correct? (You need to figure out the p value first. It is not given to you.)

Sara expected to receive 4 emails in a week. Find the probability of receiving 6 emails for the next 2 weeks?

  $If\ X∼Po​(1.8),\ find\ P(2<X<5)$  

At a local high school, GPA's are normally distributed with a mean of 2.9 and standard deviation of 0.6. What percentage of students at the high school have a GPA between 2.3 and 3.5?

A national achievement test is administered annually to 3rd graders. The test has a mean score of 100 and a standard deviation of 15. If Jane's z-score is 1.20, what was her score on the test?

The random variable T has binomial distribution T~(40,0.5). Find P(T≤12)

A new surgical procedure is successful 85% of the time. the procedure is performed 8 times and it can be assumed that it is independent each time. Find the expected value of the successful operations.

 $Find\ A^{-1}$  

 $Find\ AB$