Question

A train has one engine and six train cars. Find the total number of ways an engineer can arrange the train. (The engine must be first.)

Answer 1

Answer: 720 ways

Step-by-step explanation:

Given

A train has 1 main engine and remaining 6 train cars

If the engine is always in the front the remaining train cars can be arranged is

$\Rightarrow \text{No. of ways}=6!=720\ \text{ways}$