Associative Property
The parentheses are grouping operators.
Think about the word associate to make it easier
Here is the answer from SparkNotes
http://www.sparknotes.com/math/algebra2/operationsonfunctions/section3.rhtml
Answer:
B.) P(A/B) = P(A)
Step-by-step explanation:
If two events, A and B are independent:
We have that:

Conditional Probability
We use the conditional probability formula to solve this question. It is
In which
P(B|A) is the probability of event B happening, given that A happened.
is the probability of both A and B happening.
P(A) is the probability of A happening.
Since they are independent:

Then

So
, or either:
, and thus, the correct answer is given by option B.
Answer:
19750
Step-by-step explanation:
Answer: Subtract 9 to equal to negative four
Step-by-step explanation: