Monday

November 30, 2015
Posted by **Dan** on Tuesday, May 21, 2013 at 1:37am.

- Math (Probability) -
**MathMate**, Tuesday, May 21, 2013 at 6:33amThe size of the sample space of the last throw is 20*20=400.

Out of the 400 outcomes, Bret needs those where his throw is 11 or more than Shawn's, namely:

(12,1),(13,1),(14,1)...(20,1)

(13,2),(14,2)...(20,2)

...

(19,8),(20,8)

(20,9)

There are ∑(i), i=1,9 outcomes.

Can you figure out the probability, and a+b?

- Math (Probability) -
**Dan**, Tuesday, May 21, 2013 at 9:54amPlease tell the answer. I'm not able to get it.

Thanks.

- Math (Probability) -
**ravi&ashu**, Thursday, May 23, 2013 at 3:16pm89