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He lifetime of a 2‑volt non‑rechargeable battery in constant use has a Normal distribution, with a mean of 516 hours and a standard deviation of 20 hours. The proportion of batteries with lifetimes exceeding 520 hours is approximately:

A: 0.4207

B: 0.5793

C: 0.2000

User Tachyons
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1 Answer

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The answer is gonna be c 0.2000
User Zenkaty
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