-25 is your answer to the question
Answer: There will be 22.694 grams of initial mass remains after 50 years.
Step-by-step explanation:
Since we have given that

We need to find the quantity of initial mass remains after 50 years.
So, t = 50 years,
We get that

Hence, there will be 22.694 grams of initial mass remains after 50 years.
The probability of not winning would be :
1 - probability of winning
This is written as:
1 - n/n+3
Now to simplify as a single fraction rewrite as:
N+3/n+3 - n/n+3
Simplify to get : 3/n+3
Answer:
18%
Step-by-step explanation:
9 divided by 50