Question

There are 10 cards placed face down on a table. Four of the cards have stars on them and the other 6 are blank. You

win if you draw a card with a star. How can the game be made fair?
The game is already fair.
Add 2 cards with stars,
Add a star to 1 of the blank cards
Take away 2 blank cards

Answer 1

The first one is out, because it isn't fair. We want a 50/50 chance to win. If we add 2 cards with stars, then your chance of winning increases too much(as much as that'd be great). If we take away 2 blank ones, it would be fair, but we want to still have 10 cards. So the only choice left is to add a start to 1 of the blank cards.

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hope it helps