Suppose an instant win lottery ticket has a probability 0.21 of winning any amount. If you purchase 7 tickets, what is the probability that you will win exactly 3 times? Round to four decimals. Answer:

The probability of winning on a slot machine is 8%.  If a person plays the machine 300 times, find the probability of wining at most 20 times.

You pick 100 cards from a deck of cards one at a time.  You select the cards after replacing each card picked and shuffling.  Find the probability that you select at least 8 kings.

At bedtime, you read three books to your kids, Walker, Michael, and Luke. Together, they have 32 books. If you decide to randomly choose three books, what is the probability that the three you choose will consist of each of their favorite books? Assume they have different favorites. Express your answer as a fraction in lowest terms or a decimal rounded to the nearest millionth.

Set up the problem as if it were to be solved, but do not solve. Assume that this selection is done without replacement. Determine the probability of being dealt 2 nines from a standard deck of 52 cards when 2 cards are dealt. P(2 nines) =

find the probability that a couple has three children and at least one is a boy? assume girls and boys are equally likely. simplify do not round