RRB NTPC · प्रश्न 39
9 च्या पहिल्या 30 गुणकांची सरासरी किती?
उत्तर दाखवा आणि स्पष्टीकरण
उत्तर: (C) 139.5
स्पष्टीकरण
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.