1 votes 1 votes nitish asked Dec 20, 2015 nitish 632 views answer comment Share Follow See all 0 reply Please log in or register to add a comment.
0 votes 0 votes 15, for AB ->AB, ABC ABD ABE ABCD ABCE ABDE ABCDE FOR BC ->BC BCD BCE BCDE FOR CD ->CD CDE ACDE firstcoder answered Dec 20, 2015 firstcoder comment Share Follow See all 2 Comments See all 2 2 Comments reply Umang Raman commented Dec 20, 2015 reply Follow Share i think you missed one! 1 votes 1 votes nilamd commented Dec 21, 2015 reply Follow Share Answer is 16. 2 votes 2 votes Please log in or register to add a comment.