Question

idk if you know this one The probability that a train leaves on time is 0.9. The probability that the train arrives on time and leaves on time is 0.36. What is the probability that the train arrives on time given that it leaves on time?

0.6

0.9

0.27

0.36

Answer 1

wow this is a crappy problem
quite the collection of topics you have tonight isn't it?

Answer 2

i will tell you what they want you to do
then want you to compute
\[\frac{.36}{.9}\]

Answer 3

A = arrives on time
L = leaves on time

we're given P(L) = 0.9 and P(A and L) = 0.36

They want you to find P(A|L) and you would use the conditional probability formula

P(A|L) = P(A and L)/P(L)

to compute

Answer 4

i got 0.4 0.o @satellite73

Answer 5

yes

Answer 6

@satellite73 but thats not a answer choice ?

Answer 7

really? what are the choices?

Answer 8

0.6

0.9

0.27

0.36

Answer 9

@satellite73

Answer 10

sorry i have to stick with my answer

Answer 11

i have two questions left if you could help me @satellite73

Answer 12

last one

Answer 13

the total number in state A is 40
the number of liberals is 22
your answer is \(\frac{22}{40}=\frac{11}{20}\)

Answer 14

or if you prefer, \(55\%\)

Answer 15

ok now i want to know, before we do the last one, how you got such a random selection of problems
all different topics
now trig! and not even a basic trig question, a harder one

Answer 16

my teacher @satellite73

Answer 17

its a review @satellite73

Answer 18

a review of what? fifty different non related topics?
the answer to the last one is D, but my guess is you do not know why
am i right?

Answer 19

no lol but thank you for all your help:) @satellite73