Suppose that a sample space S consists of four simple events A-19533

Suppose that a sample space S consists of four simple events: A, B, C, and D. That is S = {A, B, C, D}. If P(A) = .4, P(B) = .3, P© = .2, what is P(D)?

This multiple choice question (MCQ) is related to the book/course vu sta301 Statistics and Probability. It can also be found in vu sta301 Final Term - Quiz No.4.