Answer:

Step-by-step explanation:
number of counties = 159
n number of people are mutually independent and equally likely home locations
considering the details given in the question
n ≤ 159
The number of ways for people ( n ) will live in the different counties (159) can be determined as
since the residents are mutually independent and equally likely home locations hence there are :
ways for the residents to live in
therefore the probability = 
A.) 250 words in 10 min
b.) 40 min
c.) yes
Hope this helps!
You have to divide both sides by 2/3, and by doing that you'll get w= -5/4