Math Is Fun Forum

thiruvoth

Member

Registered: 2009-10-19

Posts: 1

help me..... it s a probability

can u give me a solution for preparing an equation related to probability? problem is- in a group of 100 patients symtom A is present 90%, symptom B is present in 80% symptom C is present in 40% all three together in 20% A and B together in 30% and B and C together in 25% A and C together in 32%. Can u predict the probability of that disease in a same type of patients with symptom A+B, A+B+C, A+C, B+C. All these symptoms are not independent. i need an equation.

soroban

Member

Registered: 2007-03-09

Posts: 452

Re: help me..... it s a probability

. .

. .

. . . . . . . . . . . . . . . . . . .

. . . . . . . . . . . . . . . . . . . . . .

. .

.

thiruvothsohan

Guest

Re: help me..... it s a probability

Thank you very much. even though problem is wrong i got the answer.

bobbym

bumpkin

From: Bumpkinland

Registered: 2009-04-12

Posts: 109,606

Re: help me..... it s a probability

Hi thiruvothsohan;

Maybe you should post your solution so we can look at it, because soroban's work is correct. That is the formula for P.I.E.

Last edited by bobbym (2009-10-21 01:11:03)

---

In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.