A: Three fifths of the students were 150 * 3 / 5 = 90 students. The remaining 150 - 90 = 30 students did not answer the first question correctly. Four fifths of the remainder was 30 * 4 / 5 = 12 students. The number of students who answered both questions incorrectly is 24 - 12 = 12. The answer is (D).
Answer the following multiple choice question with options (a), (b), (c), (d), (e) by reasoning step-by-step.
Q:In an engineering class that contained 150 students, the final exam consisted of 2 questions. Three fifths of the students answered the first question correctly. If four fifths of the remainder answered the second question correctly, how many students answered both questions incorrectly? Answer Choices: A)4 B)6 C)10 D)12 E)24