Mathematics 20 Online
OpenStudy (anonymous):

A woman has 7 keys on a keyring, one of which fits the door she wants to unlock. She randomly selects a key tries it. If it does not unlock the door, she randomly selects another from these remaining and tries to unlock the door with it. She continues in this manner until the door is unlocked. Let X be the number of keys she tries before unlocking the door, counting the key that actually worked. Find the probability function of X. A woman has 7 keys on a keyring, one of which fits the door she wants to unlock. She randomly selects a key tries it. If it does not unlock the door, she randomly selects another from these remaining and tries to unlock the door with it. She continues in this manner until the door is unlocked. Let X be the number of keys she tries before unlocking the door, counting the key that actually worked. Find the probability function of X. @Mathematics

Latest Questions
brianagatica14: Any artist on here?
1 day ago 7 Replies 2 Medals
Uniful3: Art dump..
5 hours ago 18 Replies 1 Medal
mimix: hii i miss everyone
5 hours ago 5 Replies 1 Medal
hellokitty265: Art
4 hours ago 14 Replies 1 Medal
TarTar: Any Songwriters here???
1 day ago 26 Replies 3 Medals
YouMyPlug: Made some art to, took me 2 years to finish, ud83dudc4cud83dude29
5 hours ago 15 Replies 3 Medals