Answer:

Step-by-step explanation:
As the numbers are only between 1 and 30
Total number of possible combinations = 30×30×30 = 27000
If there are 100 attempts then

∴ Probability someone can guess the correct combination given 100 attempts is 
Answer:
Logarithm base 6 of 1 is<u> 0</u>.
27 ÷ (-2 + (-7))
27 ÷ (-9)
-3
The answer is -3. Hope that helps!
A I think I am not 100% right