Ten high-technology batteries are tested for 200 hours each.One failed at 20 hours;another failed at 140 hours;all others completed the test.FR(%)is ________ and MTBF is ________.
A)20%;880 hours
B)10%;1980 hours
C)20%;1760 hours
D)20%;1000 hours
E)80%;920 hours

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The Answer of Ten high-technology batteries are tested for 200 hours each.One failed at 20 hours;another failed at 140 hours;all others completed the test.FR(%)is ________ and MTBF is ________.
A)20%;880 hours
B)10%;1980 hours
C)20%;1760 hours
D)20%;1000 hours
E)80%;920 hours

Ten High-Technology Batteries Are Tested for 200 Hours Each