Probability Problems.

1. Feb 3, 2007

Mesmer

Let $$P(X\leq \15)= 0.3, P(15\less X \leq24)=6$$ and (P X > 20) = 0.5

I don't understand how I would find this probability: $$P(15\lessX\leq20$$

The answer is 0.2.

Last edited: Feb 3, 2007
2. Feb 3, 2007

Are you sure you posted the problem correctly? The probability of an event cannot equal 6, first of all.

3. Feb 3, 2007

Mesmer

You are correct, the problem is not posted correctly. My latex coding is lacking...I wish there were a way a could delete this post.

4. Feb 3, 2007

cristo

Staff Emeritus
Is it meant to be 0.6 by any chance? Thus, is your first equation meant to be $$P(X\leq \15)= 0.3,\ \ P(15< X \leq24)=0.6,\ \ P(X>20)=0.5$$, and you want to find $$P(15< X \leq20)$$?