Answer:
Part D is correct
Step-by-step explanation:
Answer:7.5
Step-by-step explanation: cause I looked it up lol
Answer: Option 'D' is correct.
Step-by-step explanation:
Since we have given that
Upper P (Upper B vertical line Upper A)
means

It means that probability of getting event B given that Event A is occurred.
D. The probability of event B occurring, given that event A has already occurred. is also expressed as 
Hence, Option 'D' is correct.
Plug it in
7(4) + 8(5) which would be 28 + 40
Answer: 68