Tim's phone service charges $24.39 plus an additional $0.24 for each text message sent per month. if tim's phone bill was $30.39, which equation could be used to find how many text messages, x, tim sent last month? a.$0.24x - $24.39 = $30.39 b.$24.39x - $0.24 = $30.39 c.$24.39x + $0.24 = $30.39 d.$0.24x + $24.39 = $30.39

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

step-by-step explanation: