question archive Your chance of successfully hitting a target in a game is 10%
Subject:MathPrice: Bought3
Your chance of successfully hitting a target in a game is 10%. Assume each attempt is independent, and each attempt costs 5 Dogecoins. You have 100 Dogecoins. You can buy a charm to increase your chance of success to 50%, the charm costs 80 Dogecoins. In order to be at least 90% certain that you can hit the target at least once, should you buy this charm?