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The foci of an ellipse are 8 apart and its major axis is 10. Its eccentricity is
A2/5
B5/4
C4/5
D3/5
Answer & Solution
Correct answer: C. 4/5
2c = 8 gives c = 4, 2a = 10 gives a = 5, so e = c/a = 4/5.
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