1/12
This is because there are 12 potential outcomes of this scenario. Tails, 5 is just one of them.
4a - 3b
4(5) - 3(- 2)
20 + 6
26
26 is your answer.
A number is a perfect square (or a square number) if its square root is an integer; that is to say, it is the product of an integer with itself. Here, the square root of 20 is about 4.472. Thus, the square root of 20 is not an integer, and therefore 20 is not a square number.
