3runners compete in a race. the probabilities that the 3 runners finish the race in under 10 seconds is 1/4,1/6,2/5. what's the probability that at least one of the runners will finish the race in under 10 seconds?

The cash price of a television is $580.the hire-purchase price of the television is $865.the hire-purchase price is an initial deposit of n% of the cash price and 6 equal monthly payments of $120.find the value of n.

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?

How do you solve a question like this?