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Class 12 Maths (Hindi) | Chapter 3 आव्यूह | Important Questions | Quick Revision

The marks obtained by 40 students of class IX in an examination are given below: 18, 8, 12, 6, 8, 16, 12, 5, 23, 2, 16, 23, 2, 10, 20, 12, 9, 7, 6, 5, 3, 5, 13, 21, 13, 15, 20, 24, 1, 7, 21, 16, 13, 18, 23, 7, 3, 18, 17, 16 Present the data in the form of a frequency distribution using the same class size, one such class being 15-20 (where 20 is not included)

If ‘+’ means ‘-’, ‘-’ means ‘+’, ‘ xx ’ means ‘ div ’ and ‘ div ’ means ‘ xx ’ then the value of (42-12xx3+8 div 2+15)/(8xx2-4+9 div 3) is :- यदि ‘+’ का अर्थ ‘-’, ‘-’ का अर्थ ‘+’, ‘ xx ’ का अर्थ ‘ div ’ तथा ‘ div ’ का अर्थ ‘ xx ’ है, तो (42-12xx3+8 div 2+15)/(8xx2-4+9 div 3) का मान होगा :