A boy wants to go abroad by boat and return by flight. He has a choice of 3 different boat to go and 4 flight to return. In how many ways, can the boy perform his journey?  Answers:
A) 20
B) 40
C) 18
D) 12
E) 16
Ans.(D)   Sol. Number of choices to go by ship = 3 Number of choices to return by airline = 4 From, fundamental principle, total number of ways of performing the journey = 3 x 4 = 12 ways
<result>D</result>
A boy wants to go abroad by boat and return by flight. He has a choice of 3 different boat to go and 4 flight to return. In how many ways, can the boy perform his journey?