Answer:
P(call a person not from his neighborhood) = 0.2
Explanation:
If 20 of his contacts are from his neighborhood, then 5 of his contacts are not from his neighborhood because:
25 - 20 = 5
Where 25 is the total number of contacts.
Then, the probability to call a person not from his neighborhood can be calculated as:
P = 5/25 = 0.2
Because he has 25 contacts and 5 of them are not from his neighborhood.
