question_answer 1)

An instructor has a question 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 question bank, what is the probability that it will be a and easy questions, given that it is a multiple choice questions ? 

Answer:

      Total = = 1400        n(S) = 1400       Let A = event of getting easy question             B = event of getting multiple choice questions       n(A) = 800, n(B) = 900             Required Probability =