Answer:
0.579 is the probability that a household has a VCR given they have a TV.
Step-by-step explanation:
We are given the following in the question:
Probability of all households have a TV = 88% = 0.88

Probability of all households have a TV and VCR = 51% = 0.51

We have to find the probability that a household has a VCR given they have a TV.
The conditional probability is given by:

0.579 is the probability that a household has a VCR given they have a TV.
You would divide 6 by 30.
6/30=0.2
Therefore the answer is D
1) distribute 2 to each term within the parentheses
2) combining like terms ( which means subtract a 6-2)
3) subtract 4 from both sides of the equation
4) divide both sides of the equation by 4
Final answer should be ( x = 1/4 )