GMAT Problem Solving
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Source: GWD
Level: 5
A certain characteristic in a large population has a distribution that is symmetric about the mean m. If 68 percent of the distribution lies within one standard deviation d of the mean, what percent of the distribution is less than m + d ?
- A 0.16
- B 0.32
- C 0.48
- D 0.84
- E 0.92