If 1/12 of the passengers on a ship are from North America, 1/4 are Europeans, 2/9 are from Africa, 1/6 are from Asia and the remaining 50 people are citizens of other continents, then how many passengers are on board the ship? Choose the correct choice from the following choices.
A) 120	B) 140	C) 150	D) 160	E) 180
1/12 + 1/4 + 2/9 + 1/6 = (3+9+8+6)/36 = 13/18   Let x be the number of passengers on the ship.   50 = (5/18)x   x = 180   The answer is 180.
<result>E</result>
If 1/12 of the passengers on a ship are from North America, 1/4 are Europeans, 2/9 are from Africa, 1/6 are from Asia and the remaining 50 people are citizens of other continents, then how many passengers are on board the ship?