suppose P(A and B) = 2/15 and P(A/B) = 1/4. What is P(A)?
2006-06-13 12:53:14 · 7 answers · asked by Ibnusayid 1 in Education & Reference ➔ Homework Help
You can calculate P(B) by using the formula
P(A|B) = P(A and B) / P(B)
I believe you cannot calculate P(A) - there is not enough input for this (donjuanin's answer would be correct only if A and B are independent - but you didn't mention this in your question)
2006-06-13 13:07:47 · answer #1 · answered by mikos 3 · 0⤊ 0⤋
Hey Good Luck on the exam. Just out of curiousity, let me know what the answer ends up being. I took took 2 divided by 15 got 17 and 1 divided by14 and got 5 wich comes to 7/15. I'll ask my math wiz husband when he gets home and get back to you.
2006-06-13 20:08:19 · answer #2 · answered by vboronka 1 · 0⤊ 0⤋
something around 1/2
2006-06-13 20:34:54 · answer #3 · answered by Joyous 2 · 0⤊ 0⤋
p(A and b) = p(B) . p(A/B)
which gives p(B) = 8/15
now,
p(A and B) = p(A).p(B)
p(A) = (2/15) / (8/15)
p(A) = 1/4
2006-06-13 20:04:16 · answer #4 · answered by donjuanin 1 · 0⤊ 0⤋
Pi
2006-06-13 19:56:32 · answer #5 · answered by Lupin IV 6 · 0⤊ 0⤋
your the one in school, silly
2006-06-13 19:55:52 · answer #6 · answered by snicker 4 · 0⤊ 0⤋
Do your own homework!! You won't learn it if we tell you....
2006-06-13 19:56:31 · answer #7 · answered by casperbtch 2 · 0⤊ 0⤋