: Internet access to use online banking costs you $39.99 per month. A book of checks costs you $17.95 per 100. Your bank charges you a $.05 per check writing fee for over 5 checks per month. You write an average of 25 checks per month and each one needs a 50 cent stamp. What is your cost difference per month to use online banking vs check writing?

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

the answer is a.

step-by-step explanation:

in three games of golf, alex shot two under par four times.

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step-by-step explanation:

  answer:

  write 548 as 500 + 40 + 8. multiply each addend by 5. then add the three products to get 2,740.