At the start, a jar contains only quarters and coins of lesser value. The average value of these coins is $0.16. Adding a quarter to the jar raises this average value to $0.17. What is the probability that a coin randomly selected from the jar at the start is a quarter?

At a constant it will take one hour to travel 32 mi.at that speed it will take 1/2 hr to travel the remaining 16 mi.it will take 1+1/2 hr to travel the 48mi @ 32mph.so 1 hr = 60 min& 1/2 hr = 30 min1+1/2 hr = 90 min.there are 60s in each 90 × 60 = 3600 seconds.the real question seriously is he why are they driving so slow? ! lol.