Failed to connect to MySQL: Access denied for user 'examnext_online'@'localhost' (using password: YES) 20 soldiers are standing in a row and their captain want to send 7 out of them for a mission. In how many ways can captain select them such that at least one soldier next to him is also selected. - Sarthaks eConnect

20 soldiers are standing in a row and their captain want to send 7 out of them for a mission. In how many ways can captain select them such that at least one soldier next to him is also selected.

`{::}^20C_7`

`{::}^14C_7`

`{::}^20C_7-{::}^13C_7`

`{::}^20C_7-{::}^14C_7`