Answer:
0.25
Step-by-step explanation:
Since, in the question , it is not mentioned that two balls of any specific colour,
the probability of getting two balls is: 
If you are trying to get y by itself I shown my work.
Answer:
This is a bit confusing for me but here we go.
1x110
10x11 and
i don't really know the third
Step-by-step explanation:
Answer:
option 4
Step-by-step explanation:
option 4 -1/7^12
Answer:
20
Step-by-step explanation:
20