question:Walking across campus, a student interviewed a group of students. 25% of the students took a finance class last semester, 53% took a marketing class last semester, and 40% took neither a finance nor a marketing class last semester. What percent of the students in the group took both a finance and a marketing class?
Options:
(A) 60%
(B) 50%
(C) 25%
(D) 18%
(E) 10%
answer:(D)
Stream of consciousness:{Total} = {finance} + {marketing} - {both} + {neither}
100 = 25 + 53 - {both} + 40
{both} = 18%.

question:The average age of 8 men increases by 2 years when two women are included in place of two men of ages 20 and 24 years. Find the average age of the women?
Options:
(A) 39
(B) 27
(C) 30
(D) 26
(E) 29
answer:(C)
Stream of consciousness:20 + 24 + 8 * 2 = 60/2 = 30

question:A 240 meter long train crosses a man standing on the platform in 6 sec. What is the speed of the train?
Options:
(A) 228
(B) 144
(C) 1266
(D) 188
(E) 211
answer:
(B)
Stream of consciousness:S = 240/6 * 18/5 = 144 kmph