पूर्ण संख्याएँ - L15 |अध्याय के महत्वपूर्ण प्रश्न | Class 6 NCERT गणित | 7 PM Class By Kamal Sir

UP बोर्ड 2020 | कक्षा 12th गणित के लिए महत्वपूर्ण प्रश्न | Most Important Questions | Class 12

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The number of students in a class is 75, out of which 33 1/3 % are boys and the rest are girls. The average score in mathematics of the boys is 66 2/3 % more than that of the girls. If the average score of all the students is 66, then the average score of the girls is: एक कक्षा में 15 छात्र हैं, जिनमें से 33 1/3 % लड़के हैं और शेष लड़कियाँ हैं | लड़कों का गणित में औसत अंक लड़कियों के गणित में औसत अंक से 66 2/3 % अधिक है | यदि सभी छात्रों का औसत अंक 66 है, तो लड़कियों का औसत अंक ज्ञात करें |

Q5. The marks obtained in a class test by 30 students of a class are as follows. Marks obtained Number of students No. earth ats No- ernaun ?ove 49 More than or equal to 1044 38 23 More than or equal to 25 13 More than or equal to 308 More than or equal to 354 More than or equal to 40 2 More than or equal to 5 More than or equal to 15 median l (n More than or equal to 20 Find the: (0) mean marks (i modal marks (ii) median marks. 6. The mode of the following frequency distribution is 36. Find the values of x and

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)

Construct a frequency table with class-intervals 0-5 (5 not included) of the following marks obtained by a group of 30 students in an examination: 0,5,7,10,12,15,20,22,25,27,8,11,17,3,6,9,17,19,21, 29,31,35,37,40,42,45,49,4,50,16.

Consider the marks, out of 100, obtained by 51 students of a class in a test, given in Table 14.9. M a r k s"N u m b e r o f S t u d e n t s"0-10 5 10-20 10 20-30 4 30-40 6 40-50 7 50-60 3 60-70 2 70-80 2 80-90 3 90-100 9Tot a l 51 Draw a freque

Thirty children were asked about the number of hours they watched TV programmes in the previous week. The results were found as follows: 1 6 2 3 5 12 5 8 4 8 10 3 4 12 2 8 15 1 17 6 3 2 8 5 9 6 8 7 14 12 (i) Make a grouped frequency distribution table for this data, taking class width 5 and one of the class intervals as 5 - 10. (ii) How many children watched television for 15 or more hours a week?

The distance (in km) of 40 engineers from their residence to their place of work were found as follows: 5 3 10 20 25 11 13 7 12 31 19 10 12 17 18 11 32 17 16 2 7 9 7 8 3 5 12 15 18 3 12 14 2 9 6 15 15 7 6 12 Construct a grouped frequency distribution table with class size 5 for the data given above taking the first interval as 0-5 (5 not included). What main features do you observe from this tabular representation?