How many different four digit alarm codes can be formed for a house alarm? The first digit must be a 2, 4 or 9 and all the other digits can be any number and numbers can be repeated.

Don’t know sorry about that

This law is sometimes called the grouping property. as you can see, regardless of how the numbers are grouped, the answer is still 13. the associative law of multiplication is similar to the same law for addition. it says that no matter how you group numbers you are multiplying together, you will get the same answer.