Mario earns $9.40 per hour at his part-time job. last month, he worked 7 1/4 hours the first week. 8 3/4 hours the second week, 5 1/2 hours the third week and 6 3/4 hours the fourth week. mario puts half of his paycheck in the bank every other week starting with the first. how much money did mario earn each week? how much did he put in the bank last month? how much money did mario have to spend from his 4 paychecks.?

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