From the prices of shares `X` and `Y` below, find out which is more stable in value

Explanation

To determine which share, X or Y, is more stable in value, we will calculate the coefficient of variation (CV) for both shares. The share with the lower CV will be considered more stable.

### Step 1: Calculate the Mean of Shares X and Y

1. **Mean of X (X̄)**:
- Given prices of share X: 8, 50, 51, 52, 53, 54, 55, 56, 57, 58
- Mean (X̄) = (Sum of all prices) / (Number of prices)
- Mean (X̄) = (8 + 50 + 51 + 52 + 53 + 54 + 55 + 56 + 57 + 58) / 10
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