Hello due in 3 min it’s a test please hurry ASAP

A) How many CDs and videos were sold

B) X= number of CDs sold, Y= number of videos sold

C) 40 CDs and videos were sold in all, how much each CD and video cost, total sales

D) Adding how many items were sold in all, multiplying the price of each item by how many were sold

E) Total sales {4x+6y=180}, Items being sold {x+y=40}

F) 10 videos sold and 30 CDs

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