Von-Strange Returns
Professor Von-Strange has
another of his weird and wacky ideas; he wants to implant a second pair
of eyes on to the back of all human heads.
Fortunately at this time he has no real humans to experiment on - only mannequins.
Von-Strange has been collecting glass eyes for this experiment and now has 3 green, 3 blue and 3 brown eyes. These are placed in a machine that will dispense one out at random at the press of a button.
How many times will Von-Strange have to press the button to be sure he has three pairs of matching eyes, if he doesn't check the colours as they are dispensed?
Fortunately at this time he has no real humans to experiment on - only mannequins.
Von-Strange has been collecting glass eyes for this experiment and now has 3 green, 3 blue and 3 brown eyes. These are placed in a machine that will dispense one out at random at the press of a button.
How many times will Von-Strange have to press the button to be sure he has three pairs of matching eyes, if he doesn't check the colours as they are dispensed?
8 times