3. Harbour decided to go to the new coffee cart to get his friends coffee and hot chocolate. Each coffee costs $3 and each tea hot chocolate costs $2. Harbour spent $15 total, and bought 7 total drinks. How many coffees did Harbour buy? How many hot chocolates? Write the equations for the this situation. a. b. Using elimination, solve the system of equations you wrote in part (a). help please!!

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