Camille harris has a checking account with the bank of the northwest. she earns 0.5% per month. if she maintains a balance of $1200, her checks are free, but if she goes under that amount, each check will have a two cent charge on it. for balances under $600, there is a service fee of $4 per month. use the equation i = rb - sx - f to determine her earnings on the account if she has a balance of $1500 and she writes 25 checks.
a.$3.00
b.$3.50
c.$7.00
d.$7.50

answer: i guess 5 units?

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