Probability and Stats

Question

So a child goes to a fair and buys 5 darts. Each dart has a 1/10 chance of hitting a ballon. What is the probability she hits at least one.

Answer 1

The probability of not hitting a balloon is 9/10. Therefore, assuming independence, the probability of 5 consecutive attempts result in no hits is (9/10)^5.

This means that the probability of hitting at least one is (1 - (9/10)^5), or roughly .41.