Question 25
Aerith has 5 coins, all with heads facing up. She wants to flip them so that they all have tails facing up.
a) If she must flip exactly three coins at a time (from heads to tails or vice versa), is this possible?
b) What if she must flip exactly two coins at a time?
For each part, either show a way it can be done or prove that it is impossible.
a) If she must flip exactly three coins at a time (from heads to tails or vice versa), is this possible?
b) What if she must flip exactly two coins at a time?
For each part, either show a way it can be done or prove that it is impossible.