Use this coefficient to find the binomial probability B(k) = binomial probability for input k B(k) = (nCk)*(p^k)*(1-p)^(n-k) B(4) = (7C4)*(0.35^4)*(1-0.35)^(7-4) B(4) = 35*(0.35^4)*(0.65)^3 B(4) = 0.144238
So the approximate answer is 0.144238 This value is accurate to 6 decimal places
1)Take the time he is traveling divided by the speed to get the time.
2)Subract the time you have got from the average time,then subtract the average distance from the traveling distance,then divide the two to get the speed.
3)Take the total distance, divide it by the total time to get the average speed.