After a concert for 1,200 people, only 9 people said they would not go to see the band again. what percent of the people who went to the concert said they would not go to see the band again? 1. 0.75% 2. 9% 3. 75% 4. 133% ( 10 points granted) urgently noww plzzz

x is variable or an unknown value to find

example:

2x = 5 which means x = 3

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