Question

In a train yard, there are 6 flat cars, 7 boxcars, and 3 livestock cars. A train is made up of 9 cars. Which would you use to find the number of ways the train could be made up?
A. 16P9

B. 16P7

C. 9P16

D. 9P7

Answer 1

the answer for this question isC.9p16.

Answer 2

Answer:

Option A

Step-by-step explanation:

In a train yard there are 6 flat cars, 7 box-cars and 3 livestock cars.

So total number of cars = 6 + 7 + 3

                                       = 16

Now a train is to be made by 9 cars, out of 16 cars.

So number of ways the train can be made up will be =$^{n}P_{r}$

where n = 16 and r = 9

so number of ways =$^{16}P_{9}$

Option A is the answer.