Answer:
Option C
Step-by-step explanation:

Step-by-step explanation:
First u have to do the work of bracket and the solve
1a+18=7a
18=7a-1a
18=6a
6a=18
a=18/6
a=3
The probability of all possible outcomes is always 1, meaning 100%.
In this case the probability of rolling a 1,2,3,4,5, or 6 is:
1/6+1/6+1/6+1/6+1/6+1/6
6(1/6)
6/6
1