Fred needs to print his term paper. He pulls down a box of 12 ink cartridges and recalls that 3 of them have no more ink. If he selects 4 cartridges from the box, find the probability that a) one cartridge has no ink and b) 3 cartridges have no ink.

Question

Fred needs to print his term paper.  He pulls down a box of 12 ink cartridges and recalls that 3 of them have no more ink.  If he selects 4 cartridges from the box, find the probability that a) one cartridge has no ink and b) 3 cartridges have no ink.

anonymous · Answer

I need help for the second one.