Charlotte owns two entertainment websites. Here are some details about those websites for one entire month:
Website A
Website B
Number of writers
5
11
Number of posts posted
110
200
Average number of words of post
100
170
Average likes per post
3500
3500
Average comments per post
500
450
Number of new subscribers
9000
20,000
Revenue
$30,000
$75,000
Expenses
$20,000
$47,000
Profit (Revenue-Expenses)
$10,000
$28,000
Charlotte wants to know which website generates more revenue per amount of content
1) Charlotte thought of two different ways to define this quantity. Identify these two definitions among
the following options.
i

1) C.  Number of new subscribers divided by number of posts

   D. Number of new subscribers divided by number of words

2) No. The definitions have opposite results.

Step-by-step explanation:

5

step-by-step explanation:

85.560%

step-by-step explanation:

conditional probability is defined as:

p(a|b) = p(a∩b) / p(b)

in other words, the probability that a occurs, given that b has occurred = the probability that both a and b occur / the probability that b occurs.

in this example:

p(turns 64 | turns 44) = p(turns 64 & turns 44) / p(turns 44).

if someone turns 64, they must have already turned 44, so:

p(turns 64 | turns 44) = p(turns 64) / p(turns 44)

on page 42, we see that of the original 100,000, 94944 turn 44, and 81234 turn 64.   therefore:

p(turns 64 | turns 44) = 81234 / 94944

p(turns 64 | turns 44) = 0.85560