You play a coin flipping game with 5 coins. On round 1 you flip all of them. On round 2, you pick up all the ones that came up tails (leaving all the heads alone) and flip them again. You continue to do this until all the coins are heads. For example:

Round 1: H T T H T
Round 2: - H T - H
Round 3: - - T - -
Round 4: - - T - -
Round 5: - - H - -

Done in 5 Rounds.

What is the expected number of rounds you'll need to finish the game?

What is the probability you will finish the game in 3 rounds or less?

not to be picky but probability should use dice bacease coins differ.

take five random coins.they are different thicknesses, usually the shiniest is the thickest. go figure.