A bus starts from city X. The number of women in the bus is half of the number of men. In city Y, 8 men leave the bus and four women enter. Now, number of men and women is equal. In the beginning, how many passengers entered the bus ? Choose the correct choice from the following answers:
A) 15
B) 30
C) 36
D) 45
E) 46
Explanation:   Originally, let number of women = x. Then, number of men = 2x.   So, in city Y, we have : (2x - 8) = (x + 4) or x = 12.   Therefore Total number of passengers in the beginning = (x + 2x) = 3x = 36.   Answer: 36
<result>C</result>
A bus starts from city X. The number of women in the bus is half of the number of men. In city Y, 8 men leave the bus and four women enter. Now, number of men and women is equal. In the beginning, how many passengers entered the bus ?