DSE-2005,17

Posted by sonudelhi on Jun 20, 2012; 8:06am
URL: http://discussion-forum.276.s1.nabble.com/DSE-2005-17-tp7578296.html

what is wrong

Suppose two dice are tossed simulteneously.what is prob that total spots on upper faces of dice aren't divisible by 2,3,or 5.

7 and 11 aren't divisibe
so cases are (6,1)(1,6)(5,6)(6,5)

hence prob=4/36=1/9

but ans in key is 2/9    how????