Calculating the Probability from a Given Situation
An instructor has a test bank consisting of 300 easy true-false questions, 200 difficult true-false questions, 500 easy multiple choice questions and 400 difficult multiple choice questions.
If a question is selected at random from the test bank, what is the probability that it will be:
a) An easy question
b) An easy multiple choice question
c) An easy question, given that it is a multiple choice question.
... = 800
P(easy question) = 800/ 1400
b) P(easy MCQ) = 500 / 1400