Question: calculate standard deviation for the investment based on the table below: Probabilty Returns 0.4 7% 0.2 12.5% 0.4 18%
calculate standard deviation for the investment based on the table below:
| Probabilty | Returns |
| 0.4 | 7% |
| 0.2 | 12.5% |
| 0.4 | 18% |
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