Answer: Option 'a' is correct.
Step-by-step explanation:
Since we have given that
Probability of owned a sedan = 39%
Probability of owned a van = 33%
Probability of owned a sports car = 7%
n = 3
We need to find the probability that all three randomly selected households own a van.
So, Probability of getting all 3 own a van is given by

Hence, Option 'a' is correct.
Answer:
Subtract
from
we get 
Step-by-step explanation:
We need to Subtract
from 
<em>(Note: Considering 2d^2 instead of 2d as thinking it typo error)</em>
Subtracting from means we have to subtract 
Subtracting:

Combining like terms (Like terms are those that have same variables like 4c^2 and 3c^2 are like terms, 3cd and -12cd are like terms, 2d^2 and 4d^2 are like terms)

So, Subtract
from
we get 
We know that :

Here Adjacent Side is BC, which is Distance between the Sun and Earth
Hypotenuse is CA, which is Distance between the Sun and Shooting star
⇒ 
Given : Distance between Earth and Sun (BC) = y
⇒ 
⇒ 