Please help, i do not know how to find the answer without being given the amount of generators in the problem.

During a recent military mission, the US Army relied on generators specially designed for battle conditions. The units were tested back home for 250 hours each. One generator failed at 14 hours; all other generators completed the test. According to this information, the percentage failure rate (FR%) is ______ and mean time between failure (MTBF) is ______ hours, for a typical desert generator. (Hint: compute FR(N) to obtain MTBF.)

	A.	8.3%; 2764
	B.	12%; 1/2764 hours
	C.	10%; 2986
	D.	10%; 1/3000
	E.	8.3%; 1/2986 hours