A boy wants to go abroad by boat and return by flight. He has a choice of 4 different boat to go and 7 flight to return. In how many ways, can the boy perform his journey?
Choose the correct choice from the following answers:
A) 28  B) 30  C) 43  D) 45  E) 80
Ans.(A)   Sol. Number of choices to go by ship = 4 Number of choices to return by airline = 7 From, fundamental principle, total number of ways of performing the journey = 4 x 7 = 28 ways
<result>A</result>
A boy wants to go abroad by boat and return by flight. He has a choice of 4 different boat to go and 7 flight to return. In how many ways, can the boy perform his journey?