Statistics

Mimi plans to make a random guess at 10 true-or-false questions. Answer the following questions:

(a)  Assume random number X is the number of correct answers Mimi gets. As we know, X follows a binomial distribution. What is n (the number of trials) , p (probability of success in each trial) and q (probability of failure in each trial)?

(b)  What is the probability that she getsa passing grade; in other words, she gets at least 6 correct answers? (Show work and round the answer to 4 decimal places)

(c)  How many correct answers can she expect to get? (Hint : What is the expected value of the binomial distribution?)  (Show work and round the answer to 2 decimal places)