Question

Six different airlines fly from New York to Denver and seven flies from Denver to San Francisco. How many different pairs of airlines can you choose on which to book a trip from New York to San Francisco via Denver, when you pick an airline for the flight to Denver and air line for the continuation flight to San Francisco?

Answer 1

Explanation:

6 flights from New York to Denver

7 flights from Denver to San Francisco.

total number of combination

6*7= 42