The probability of rolling a 6 on a biased dice is 1/5 work out the probability

1/25.

Step-by-step explanation:

The second roll is independent of the first so the probabilities are multuplied

Prob(rolling 2 sixes = 1/5 * 1/5

= 1/25.

2 root (x-5)=2

Divide each side by 2 (in order to isolate the square root):
Root (x-5) =1

Square both sides to remove the radical sign:
(x-5)=1

Solve:
x=6

To be sure that it is not an extraneous solution, check the solution by replacing the value for the variable in the equation.

2 root (6-5) = 2

The square root of 1 is 1.

2(1)=2
This is correct.