<h3><u>
Answer:</u></h3>
Hence, the probability that the first 3 cars are in car number order is:

<h3><u>
Step-by-step explanation:</u></h3>
A train has 10 cars numbered 1 through 10.
If the cars are coupled randomly, what is the probability that the first 3 cars are in car number order.
The probability of the three cars is independent and we know that when the events A,B and C are independent then

As, the first car chosen is to be selected among 10 cars.
Hence, the probability is:

similarly the second car is to be selected among 9 cars.
Hence,

similarly,

Hence, the probability that the first 3 cars are in car number order is:
