I am stuck on a problem, and if someone could help... it would be great!!
Question is :
If P(A intercept B)=.23, P(A)= .7, and P(B)= .9, what is P(A I B) ?
Are these events independent?
2006-10-31 03:06:56 · 4 answers · asked by Heather N 2 in Science & Mathematics ➔ Mathematics
P(A | B) = P(A ∩ B)/P(B)
P(A | B) = (23/100)/(9/10) = 23/90 = .255[5] (the brackets indicate a repeating decimal)
The events are not independent. The probability of A occurring if B occurs is substantially less than the probability of A occurring if B does not occur.
2006-10-31 03:16:54 · answer #1 · answered by Pascal 7 · 0⤊ 0⤋
Use this formula for P(A|B):
P(A|B) = P(A â© B) over P(B)
Thus you have:
P(A|B) = (0.23)/(0.9) = .255
2006-10-31 11:21:57 · answer #2 · answered by Centurion 2 · 0⤊ 0⤋
What's the I for?
2006-10-31 11:17:14 · answer #3 · answered by Nose Lobes 2 · 0⤊ 1⤋
No idea my litta freind
2006-10-31 11:14:20 · answer #4 · answered by ~Peace~N~Love~ 3 · 0⤊ 3⤋