A statistics student sets TWO alarm clock to be sure to wake up on test day. If each clock has a 95% chance of working, what is the probability that both will failto work any given day? Round your answer to four decimal places.

You buy a lottery ticket that costs $20. There are only 100 tickets available to be sold in this lottery. There are three $500 prizes, 4 $100 prizes, and 10 $20 prizes. Find your expected gain or loss. Round your answer to 2 decimal places. Please do not include the dollar sign in your answer (Ctrl) -

Terry purchases 30 scratch off lottery tickets. Each ticket has a 10% chance of winning. What is the probability that she has her first successful ticket on the 10th try?(Round to 4 decimal places)

Plzzz solve and choose correct option.

Solve it correctly.

You host a house party with 4 guests attending. Every guest gets a chance to win a gift by spinning a wheel with 1/3 of a chance of stopping at the winning spot. If you prepare 2 gifts to give away, what is the probability of you being embarrassed for running short of gifts (i.e, there are more winners than the number of gifts). Round your answer to two decimal places (for example: 0.12)