Re: MQE 2013 QUESTION 23

Posted by Sinistral on Mar 18, 2013; 6:04pm
URL: http://discussion-forum.276.s1.nabble.com/MQE-2013-QUESTION-23-tp7579854p7579874.html

what am I missing while counting???:

P =  P(both red balls) +    P(1R + 1B)    +  P(Both White)    +    P(1B + 1W)      +    P(1R + 1W)
   =    (5/11)(5/11)    +  (5/11)(4/11)  +     (2/11)(2/11)     +   (4/11)(2/11)     +   (5/11)(2/11)
   =     (25+20+4+8+10)/121
   =       67/121