RRB NTPC · प्रश्न 39
9 के प्रथम 30 गुणजों का औसत क्या है?
उत्तर देखें और व्याख्या
उत्तर: (C) 139.5
व्याख्या
The first 30 multiples of 9 are 9 × 1 to 9 × 30. Their average = 9 × (1 + 30)/2 = 9 × 15.5 = 139.5.
Railways PYQCBT 1 2016
RRB NTPC · प्रश्न 39
उत्तर: (C) 139.5
The first 30 multiples of 9 are 9 × 1 to 9 × 30. Their average = 9 × (1 + 30)/2 = 9 × 15.5 = 139.5.