Answer:

Step-by-step explanation:
Given
--- [R, Y, C and B]

Required

Since each of the 4 balls are equally likely, their probability is:

From
, we have:


So, the total arrangement of the 8 balls is:




The individual probability of each ball, when put together is




Lastly:




Answer:
19 and 157
Step-by-step explanation:
Answer:
43,45
Step-by-step explanation:
43+45=88