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1. The average of 20, 70 and x is 40. If the average of 20, 70, x and y is 50, then y =?
- A. 100
- B. 100
- C. 100
- D. 100
Answer: Option B
Explanation:
20 + 70 + x = 3 × 40
বা, x = 30
20 + 70 + 30 + y = 200
বা, y = 80
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