I think that the next numbers are 1/3, 1/5 and 1/6
Answer:
The answer is "0.142466".
Step-by-step explanation:
Using the p formula for the proportion of nonconforming units through the subgrouping which can vary in sizes:


Defects 

It calculates the controls limits through the p-chart that is:

So, the upper control limits:

You are missing crucial bits of information. If you could reply with the missing information, I will do my best to assist you :)
I’m pretty sure the answer would be A because the 5 makes the 9 round up to ten and then the 7 becomes an 8.