We're told that



a. We want to find
. By definition of conditional probability,

By the law of total probability,

Then

(the first equality is Bayes' theorem)
b. We want to find
.

since
.
The 5 in the ten thousandths place is 10 times greater than the 5 in the thousandths place.
Answer:
2
Step-by-step explanation:
The answer is 248. Working out is in the picture.
Answer:
If asking for the distance, the answer would be C.