I really need help!!!

The kitchen, dining room, and living room of a house will be painted, each with a different color. There are 7 colors to choose from. This means that there are _[blank]_ color arrangements possible.

What number best completes the sentence?

Enter your answer as a number, like this: 42

Answer:21

Step-by-step explanation:First, you put all of the possiblities for the kitchen.

K1K2K3K4K5K6K7Then, you multiply 7 by each room which would be 3 so,

3 * 7 = 21So, 21 is probably your answer.

Lastly, have a great day!

Answer:3

Step-by-step explanationcause there are three rooms that need to be painted