2 votes 2 votes 3 boys and 4 girls have to sit in a row with all arrangements equally likely. What is the probability that no 2 boys sit next to each other a)1/7 b)2/7 c) 3/7 d)4/7 Sanjay Sharma asked Oct 11, 2017 Sanjay Sharma 956 views answer comment Share Follow See 1 comment See all 1 1 comment reply Prashant. commented Oct 11, 2017 i edited by Sanjay Sharma Oct 12, 2017 reply Follow Share Total cases of filling 7 seats = 7! Now Place 4 girls first = 4! ways _ G1_G2_G3_G4_ Now we have 5 position and 3 boys = 5p3 So probability = (5p3 ) 4! / 7! = 2/7 1 votes 1 votes Please log in or register to add a comment.