# Inverse cumulative normal dis help

1. Aug 29, 2005

### bayan

any one know how to solve for $$k$$ in the following question?

$$Pr(X<k|X<23)=0.32$$ where $$X-N(22,25)$$.

I just cant get it.

2. Aug 29, 2005

### TenaliRaman

P(X<k|X<23) = 1 if k >= 23 why??
if k<23, then
P(X<k|X<23) = P(X<k)/P(X<23) why??

-- AI

3. Aug 29, 2005

### bayan

doesn't work out and they have the answer as 17.525 in book.

any helps

4. Aug 29, 2005

### EnumaElish

What does this notation mean: $X-N(22,25)$ ? Can you express it with words?