Question

In a train yard, there are 12 flatcars, 10 tanker cars, 15 boxcars, and 5 livestock cars

A. If the cars must be connected according to their final destination, how many ways can they be arranged.

B. How many ways can the train be made up if it is to have 30 cars? Is this a combination or permutation?

C. How many trains can be formed with 3 livestock cars, 6 flatcars, 6 tanker cars, and 5 boxcars.

Answer 1

For A)

12! 10! 15! 5!

Answer 2

time ?

Answer 3

times? yes

Answer 4

12!* 10! *15! *5! ?

Answer 5

yes

Answer 6

A) Question not clear.It may be of any type then answer is 12! * 10! * 15 * 5!
B)It is a combination and equal to (12+10+15+5) C 30=42 C 30
C)3rd answer is No, of trains=3! * 6! * 6! * 5!