Because of this assumption, they simply calculate 48 divided by 4 first.
48 divided by 4 gives us 12.
Then, they add 12 to 12 and arrive at the number 24.
If you thought the answer was 24, you are not alone, but you missed a key mathematical symbol!
In mathematics, an exclamation mark after a number is not an exclamation of excitement.
It is a mathematical operation called a factorial.
A factorial of a whole number means multiplying that number by every positive integer below it down to one.