isi msqe ques

Posted by crazy7437 on Oct 15, 2015; 6:10pm
URL: http://discussion-forum.276.s1.nabble.com/isi-msqe-ques-tp7599400.html

There are two boxes, each containing two components. Each component is defective with probability 1/4, independent of all other components. The probability that exactly one box contains exactly one defective component equals
a) 3/8
b) 5/8
c) 15/32
d) 17/32
i am getting 27/32. can anybody help please ?