Answer:
If a family is selected at random, the probability that this family does not get news from either TV or from local paper = 6% or 6/100
Step-by-step explanation:
From the given data:
The total number= 100
Families that got their news from TV =60
Families that got their news from local paper= 54
Families that got their news from both TV and local paper= 20
The probability that family does not use any one of these sources for the news = 1 - probability of the event
If a family is selected at random, the probability that this family does not use any one of these sources for the news = 1 - (The probability that a selected family get news from either TV or from local paper)
If a family is selected at random, the probability that this family does not use any one of these sources for the news = 1 - (60/100 + 54/100 -20/100)
= 1 - (94/100)
= 1 - 0.94
=0.06
If a family is selected at random, the probability that this family does not get news from either TV or from local paper = 6% or 6/100