the answer is possibly I don’t know
Step-by-step explanation:
So, it's a 3 digit number that is divisible by 11, and starts with a 1, and ends with a 1.
each of them paid the same amount, let's say y and we know that if we multiply this y by 11, we'll have a number with a "2" at the end: so the last digit of y must be 2, since only 2*1=2
also, the first digit of y must be 1, since the first digit of the 3-digit number is 1.
so lets try what happens if they all pay 12 dollars? the sum is 132, so A must be 3!!!
... when the universe grows cold. (Or someone made a typesetting mistake.)
Standard deviation is the square root of a non-negative number. It will NEVER be negative.
