Table - Weekly Electricity Usage (kWh)

| Apartment | Mon | Tue | Wed | Thu | Fri |
|---|---:|---:|---:|---:|---:|
| Flat 1 | 12 | 14 | 13 | 15 | 16 |
| Flat 2 | 18 | 17 | 19 | 16 | 18 |

Q: What is the overall average daily electricity usage for both flats?

Question

Table - Weekly Electricity Usage (kWh)

| Apartment | Mon | Tue | Wed | Thu | Fri |
|---|---:|---:|---:|---:|---:|
| Flat 1 | 12 | 14 | 13 | 15 | 16 |
| Flat 2 | 18 | 17 | 19 | 16 | 18 |

Q: What is the overall average daily electricity usage for both flats?

Accepted Answer

1. Sum for Flat 1: $12+14+13+15+16=70$.  
2. Sum for Flat 2: $18+17+19+16+18=88$.  
3. Total for both flats = $70+88=158$ over $10$ readings (2 flats × 5 days).  
4. Average = $158/10=15.8$ kWh. **Overall average = 15.8 kWh.**  
FINAL_ANSWER: b

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