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1. Mamun is twelfth from the left and Alam is fifteenth from the right in a row. If we interchange their positions, Alam becomes twentieth from right. How many boys are there in the row ?
- A. 30
- B. 30
- C. 30
- D. 30
Answer: Option B
Explanation:
Total number of boys in the row
=12+20-1
=31
(ans)
=12+20-1
=31
(ans)
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