Re: Maths doubts

Posted by Ankur9 on May 27, 2014; 4:05pm
URL: http://discussion-forum.276.s1.nabble.com/Maths-doubts-tp7590782p7590812.html

Total bulbs = 15
Defective = 1
Non Defective = 14
a) Choose one defective bulb out of three

14C2 x 1C1 = 91

b) All are non defective

14C3 = 364