4 couples (8 people) are getting on a double-decker bus that has 4 seats on each floor. How many different ways can they sit on the bus so that each person's partner is on the opposite floor?

There are 9216 different ways.

Step-by-step explanation:

Since we have given that

Number of couples = 4

Number of people in couples = 8

Number of seats on each floor = 4

Number of ways to select a person from each to send him (or her) to the upper deck would be

Number of ways to select a person to send them to the bottom floor would be

Number of ways to select a person to send them to the upper floor would be :

So, the total number of different ways would be :

Hence, there are 9216 different ways.

y-1700=200(x+4)

step-by-step explanation:

200(x+4) is 200x + 800 she is saving 200 per week x is the weeks and the -1700 is. us that’s howmuch she already had