PROBLEM SOLVING The organizer of a cast party for a drama club asks each of the six cast members to bring one food item from a list of ten items. Assuming each member randomly chooses a food item to bring, what is the probability that at least two of the six cast members
bring the same item? Express your answer as a fraction in simplest form.

How do you answer this question? (step by step)

How do you use the additive inverse to evaluate an expression that uses subtraction in a full sentence

/is used for a fraction 1) if x = 2/3 and y = 3/4, what is the value of (x + y) (x/y) expressed as a common fraction? 2) what is the least positive integer greater than 1 that leaves a remainder of 1 when divided by each of 2, 3, 4, 5, 6, 7, 8, and 9? 3) the ponde family's powerjet pumps 420 gallons of water per hour. at this rate, how many gallons of water will it pump in 45 minutes? 4) kim's insurance company pays 80% of the cost of all prescription medication she purchases in a year beyond the first $250 worth of prescriptions. her prescriptions for this year cost a total of $570. how many dollars of this amounts will kim's insurance company pay?