Henry rolls 2 number cubes numbered 1 through 6 while playing his favorite board game.
He will get a second turn if he rolls a sum that is an even number less than 10.
What are Henry's chances of getting a second turn when he rolls the number cubes?

What is the binomial expansion of (2x-3)^5

Monthly water bills for a city have a mean of $108.43 and a standard deviation of $32.09. find the probability that a randomly selected bill will have an amount greater than $155, which the city believes might indicate that someone is wasting water. would a bill that size be considered unusual?

Which shows the correct solution of the equation 1/2a+2/3b=50, when b=30?