A deck of 51 playing cards which consists of 3 aces is shuffled at random. The cards are then turned up one by one from top. Find the expected (average) number of cards to be turned up, until second ace appears.
Find more such problems at the math contest here: Gordian Knot - http://felicity.iiit.ac.in/
This section requires Javascript.
You are seeing this because something didn't load right. We suggest you, (a) try
refreshing the page, (b) enabling javascript if it is disabled on your browser and,
finally, (c)
loading the
non-javascript version of this page
. We're sorry about the hassle.
No explanations have been posted yet. Check back later!