Match the following.
| List-I (Symbols) | List-II (Applications) |
| a. r | 1. Economic order processing |
| b. $$\overline {\text{X}} $$ | 2. Mode |
| c. σ | 3. Mean |
| d. Z | 4. Deviation |
| 5. Correlation |
A. a-5, b-3, c-4, d-2
B. a-1, b-2, c-3, d-4
C. a-4, b-3, c-2, d-1
D. a-5, b-2, c-4, d-3
Answer: Option A

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