1 . The average age of the 20 aspirants of a class is 19.2 years. After some time two more aspirants join them and then average is increased by 0.3 years. Find the difference between the age of new aspirants .
- A. 12
- B. 15
- C. 18
- D. None of these
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জনতা ও রূপালী ব্যাংক- অফিসার ১৩.১২.২০১৯
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