24 1/2 or 24.5 is the answer
Answer:

Step-by-step explanation:
Given


Required
Determine the probability before the request of past experience
In this case, we only consider the 50 50 chance probability



Answer:
b/(1/4)(f)=a
Step-by-step explanation:
b=1/4af
b/(1/4)(f)=a
Its 2 i guess but im not sure